After staring at the picture for about an hour and looking a couple times at the 332s, I bit the bullet and purchased the 339
The deciding factor was the post Yuking made about the 332 working with 600ohm cans, but being better with 250ohm cans. My parents are furious, they don't get why I need a $650 amp for $350 headphones, but I've think I've actually been pretty conservative.
I built this system up over the past two years starting with the source (X-Fi Ti HD) that got added to my gaming PC. Then I bought a pair of ATH-AD700 which I used for a while, but could never really get used to them. I watched Amazons price fluctuations on the DT880/600 for months and picked them up at the low point of $260. They've really been great in terms of comfort as I have a rare muscle conditions in which my muscles can't relax (like tetanus, but caused by my immune system)--and I love the sound. (The doctors finally figured out what it is and it'll take some months to get completely under control, but I'm already doing better).
The last missing piece was my amp, which I'll admit I went over budget on (I've been using an old Onkyo A/V receiver). I initially wanted the Crack at first and was determined to build it myself. When I realized I no longer had the dexterity or the visual acuity to do it anymore they had let their tech go. I really didn't want to go entry level, so I kind of disregarded the 336, which I'm sure is a good amp. The 332 would probably have worked out, but something about the 339, just made me really want to get it.
This should be my last audio purchase for a while, unless I really need to get something to replace the onboard sound on my laptop (but I use my PMP around the house the laptop is more of a gaming emulator). I've also decided no more PC upgrades until I can sit at my desk longer when my condition is under control (if I ever get to that point). I've come to the conclusion the high/med settings are just as fun as ultra settings, and much cheaper to maintain. I may go SLI if I can get another GTX 570 for cheap, but I don't see a reason to upgrade every year anymore like I used to (if I could get back all the money I gave to nVidia over the years...). Lately I listen to music at the end of the day and rest my eyes for work rather than play games.
My home rig is now going to be X-Fi Ti HD --> La Figaro 339 --> DT880/600. I understand what people mean about the DT880s being sterile when used straight out of an amp, but having a sound card with an equilizer and enhancement functions, I find them to be engaging.
I know it was more than I wanted to spend, but I'm really looking forward to it.