On a budget:
Zildjian ZXT or ZHT
-14" ROCK hi-hats (much better suited for rock than 13 inchers)
-16" ROCK crash
-20" ROCK ride
These cymbals could be bought at Guitar Center pre-packaged together for $300 (ZXT) and about $400 (ZHT). These pre-packs usually come with some kind of free gift (a cymbal bag and a bonus cymbal and stickers). Last time I checked the ZHT's come w/ a bonus 18" crash. The crash is a real score as two crashes work great when playing rock.
Down side to these cymbals is that after a few years you may grow out of them. They are great cymbals but you might save yourself some money in the long run if you buy pro cymbals now. This is all about your personal taste but for rock I'd personally suggest:
Zildjian A-Custom or A-Series
-14" rock or mastersound hi-hats
-16" and/or 18" rock, medium or medium-heavy crash
-20" rock, medium, ping or crash ride
Expect to pay more than $600 for this particular selection but it'd be well worth it. These are the cymbals I've been wanting to buy (I've grown out of my old Zildjian ZBT's). Again, Guitar Center offers A-Zildjian pre-packs and you get some kind of bonus w/ the pack (either a crash or a splash and a cymbal bag). I'd say this would be your best option for great sounding rock cymbals.
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