DT 770 seems to meet all your needs. I know they can be had from the $150-$175 range on here, so you could just spend the rest to get an amp. Even a $40 cmoy amp should do the trick.

Aside from really bass heavy music, I think the HF5 are the best of the best for IEMs in this price range. Highly recommend them.

Etymotic HF5. I recommend them to people all the time and they never walk away dissappointed. Best IEM for $100 IMO.

I'll recommend the the Etymotic HF5. They have a great reputation here and I've had great experinces with them as well. Not as bass heavy as the ibeats but much better overall IEMs. 

I agree with the majority here and totally recommend the HF5. Meets all the standards you're looking for, and I actually have fallen asleep with them once. I wouldn't recommend doing it all the time, but I didn't notice until that morning...and they were still in place

Another vote for the HF5. Can't recommend them enough

If you need apple controls, probably the s4i but your choices are limited. If you don't absolutely need them, I'd go with the Etymotic HF5.

+1 on the Atrios

The Etymotic HF5 are $95 on Amazon right now. IMO the best, most detailed sound your're going to find in the $100 price range. Great for classical music. Be aware that they block out a ton of noise, and that was a concern of mine when I used these on a busy campus with crossing streets and whatnot.

I've seen the Denon AH-C360 for around $40 online. Good in-ear for the price.

I'd recommend the Etymotic HF5. Best sound quality you'll get for the price, they'll stay in your ears for those with active lifestyles, and they scream quality when you take them out of the box.

Quote: The HF5's are great all around for all types of music. IMO best earbuds in the $100 price range. Bass isn't huge compared to others but your music doesnt sound like it has a ton of bass anyway.

I have both the etymotic hf5 and the older er6i. Always had great experiences with them, very detailed sound, can't go wrong IMO.

All good choices you have there. You've obviously done your research. Personally, I've always had great experiences with Etymotic, so that would be my top recommendation.

It looks like you have a pretty tight budget based on your findings so far, and honestly you'll be hard pressed to find anything in that price range that outperform your Bose IEMs. The Denon AH-C360 are a great little IEM for the price, and they have that warm feel that your looking for. I've...

Check out the Westone UM2's. Definitely have the bass you're lookng for and I've seen them around the $230-$240 range. 

My top choice is always the  Etymotic HF5 for anyone looking in the $100 range. If bass is super important to you though, maybe the Klipsch Image s4 would better suit you. I think they even offer an enhanced bass version.

Both of these are going to be just about maxing out your $300 budget, but both the B&W P5 and the Beyerdynamic DT 1350 are great choices. Top notch sound quality across all genres of music, good styling, portability. Can't go wrong with either one. Like Lizardking1 said, if your looking for full...

The Creative Aurvana Lives are pretty underrated. The Beyerdynamic DT235's and AKG K518's are also solid choices, and I believe their both quite a bit under your $100 budget. 

The A-Jays One (or even the A-Jays Two if you can find a deal) might be worth checking out. I think they're around $40 but I like the quality for the price they've gotten decent reviews so far.

Tried my friends Q701 (unamped) a few weeks ago and I loved them. I've been saving to get a pair myself, they've got my vote.

HD-25's would be a decent choice if you have the $$. I've also heard good things about the V-Moda Crossfade M80's, but I've never used them personally. Also, can't go wrong with the AT M50's, but they may be a little bulky to be used for portable use. If you're looking for something Beats-ish...

Another vote for the hf3 or hf5. I own an older pair of er6i's and they seem to fit you criteria too. Etymotic tends to have great noise isolation and stay in the ear well from my experience. Also take a look at the Klipsch Image S4. They've been getting pretty solid reviews as well.

I agree with the majority here. For the price you could just do so much better in terms of sound quality. They do look damn nice though, and Monster is obviously appealing to the image conscious consumer rather than those looking for quality. If the Beats appeal to you, go for it...I wasn't...

Ultimate Ears 700 are a good bet   I love me Etymotic ER-6i if you can still find them. Should be right at $100