I've had these areound for a while and absolutely love them, IMO its the best $100 a headphone freak can spend. I was really happy with the bass response and they're practically weightless. 

The Grado SR-225i was my first real pair of "audiophile" headphones and I loved them to death. In a foolish fit last month, I traded them away. After trader's regret set in I found a pair of goldie 325is that had been modded with detachable cables and screw fasteners to keep the headphones from sliding down. I must say the goldie 325is are heavier but not in an obtrusive way, this sounds cliche but you can "feel the quality" as opposed to their little plastic brother the 225i. I loved the 225is but I'm really blown away by the difference between the two models. The 325i goldies are really remarkable with a better low end, more brilliant/clear highs and, in my opinion, the best sound signature. These only confirm I've got to keep working to get those GS1000s--they're the most beautiful looking headphones available. A+ Joe Grado, as always. One of these days maybe I'll be able to afford your top end!

When considering the wide range of IEMs out there I was fairly perplexed when it came to making a decision, it's the classic "headfiier's dilemma." Nobody wants to miss out. I've owned a number of headphones and the HF3s are your best bet for outstanding IEMs under $200, not to mention their customer service is unbelievably helpful (especially you Charlene!). 
 
Bass/Fit: There are a lot of reviews saying the Etymotics aren't great at the low end response--it seems they should try other tips to find a better seal. I found the HF3 response very flat (with an almost Grado-like sound signature) that's light and fun to listen to. I've had UE TF-10s (reshelled) and their identical mate the MAudio IE40 which are both considered bass heavy but the HF3's punch and clarity were outstanding. I can vouch that the low-end response increases a bit after burning them in (I use a standard burn-in cd). My only regret is that I didn't snag some of their custom fit tips. I love them with my little iBasso T4 amp even though they also sound nice straight from the ipod (or blackberry in my constantly "on the go" case). The headphone wire is great, I don't know what they did but it doesnt tangle like some of the other cables out there. I do the 3 finger coil wrap and they never get twisted or knotted. The outter shell of the wire is very durable and light. They don't weigh anything and I forget sometimes I have them in. 
 
Value: I'm a believer in Etymotic. I was a bit skeptical but the comfort and accuracy (with ipod button convenience) won me over instantly. I listen to a wide range of music (and different cans) and have never been taken by surprise--the HF3s are brilliant sounding and don't have that "tiring" effect some IEMs have...you listen to them for a bit and have to stop or change headphones...not the case with HF3. I'd really be curious to see what Etymotic's top end custom fit IEMs sound like...
 
 
Bottom line: Fun, accurate, comfortable IEMs that will really blow you away for the price tag.