Yeah, get something with something intergrated, if you plan to use phones that are harder to drive (either way, an amp is good), the M-audio Revolution 5.1 apparently has one, and Cyrillix was rather happy with it (although he's moved onto a better amp now.)
If you are looking for some easier to drive phones, I'de recommend 555's and 595's (although you didn't ask, and others probably will recommend the A900), I have personally used the 595's temporarily unamped and they were rather nice sounding (probably better then my 600's unamped now as these are somewhat thin and lacking in various areas, can't wait till I get my amp and can comment on the huge differences.)