I can't really tell you what would be good for a headphone upgrade (currently using DT770 as my main) but the O2/ODAC is a great upgrade from the Fiio E7. I just got it and it really improves the sound of all the headphones I've been throwing at it.

  I really like the soundstage on the K550. Makes it really good for gaming and I tend to enjoy full-size headphones anyways. I also found that the bass was still present in the K550 and just ramped up the EQ a bit to get more quantity.   EDIT: Meant to add a quote.

  I guess I had a brain fart. I meant the LP2.

I tend to lean towards the more bass heavy headphones:   VSonic GR07 Bass Edition DT770 tied with HD558 AKG K550 Atrio MG7 Senn SE215

I saw someone with some V-Moda's on the bus the other day. Couldn't tell what model but I think it was a Crossfade.

It's nothing too special but I love it. Next thing on my purchase list is a Magni/Modi combo but that'll have to wait a little while.   Gear list: AKG K550 Beyer Dynamic DT770 Pro 250Ohm Sennheiser HD558 with foam mod Fiio e7  

1. VSONIC GR07 BE 2. Beyer Dynamic DT770 (Only comes out over the K550 because of comfort) 3. AKG K550 4. Atrio m5 5. Shure SE215

The good ol' ATH-M50s. I used them for a couple years and have gone on an upgrade spree over the past year trying to figure out exactly what I like in a sound signature. Finally settled on the GR07 BE and DT770. Thanks for all the reviews head-fi-ers

Quote: What headphones are those? They're damn sexy.

Quote: I had the HD558s for a couple weeks. If I recall correctly, they had less bass than the K550s but were otherwise a great sounding headphone. The only reason I returned them was realizing how light my bank account was getting!

I have the K550s and DT770s and between the two of them I'd say the DT770s are closer to what you're looking for.

I am looking to get a closed pair of headphones in the $300 range. I'm used to looking at bass heavy headphones and have mostly ignored the bass lighter headphones until I picked up a pair of HD558s out of curiosity of the open sound stage I kept hearing about. I really liked their sound but I...

Check out the Atrio m5s from atrio.me. They have great bass and are about $100 after you use the 50% off couple that's been floating around. I can't remember what the coupon code is so do a quick google search.  

I am trying to upgrade from my Klipsch S4 earbuds since they're kinda beat up and I'm able to listen to music at my new job. I was thinking about getting the Shure SE215 but I'm not sure if I would really notice much of a difference in sound quality. I was also thinking about the TripleFi 10 but...

I'm hoping you guys can help out. My ATH-M50s were cutting out a bit on the left side when I would jiggle the cord at the plug so I replaced it with replacements I found at RadioShack. Only problem now is the part I used was apparently of really bad quality because it won't fit into a standard...