Namrac has learned a lot very quickly. Soloz2 also uses DT770s, or used to. Maybe he'll see this thread.
And as far as not being able to buy headphones on Newegg, they have very few I would call Audiophile grade, other than the high end Sennheisers that they carry.
Some DT770s would be great, albeit expensive. I like my Audiotechnica A900s a LOT, and they are great for isolation, and sound quality. However, the A900s are discontinued, so they're kind of hard to find now. If you thought those Bose headphones sounded good, just wait until you get a high end pair from one of the lesser-known audiophile companies, and you will be blown away. For some low-resistance headphones (my A900s included) they will sound great without an amp. However, adding an amp will really make higher-resistance headphones sound amazing. If the DT770s are too expensive for you (and I wouldn't blame you if they were) you could look into some DT660s. Also, I have heard a lot of good things about AKG's K181DJ cans, but have no personal experience.
Best of luck in your newfound love of hi-fi audio.