I think the sr-60's would fit you nicely. The 80's i think will need a amp, and since your on a budget id go with the 60's.
Also, another one you might want to look at are the Sony V6..
There close type though, so it has its good and its bad, but overall its a good pair of cans. Actually since i doubt you will be using these on a portable source, these might fit better in your price range. I think close headphones would be better on computers hmm.. actually maybe i should get some instead of those bluddy logitech z640's ...