I don't think they changed anything Ghâzh.
7200RPM was key here and sicne he might also be recording (Youtube?) that's probably the best option. If there was no SSD I'd agree on the Black drive. If the HDD is pure storage then a Green drive is fine.
There are actually 7200RPM green drives now:
Western Digital Caviar Green 1.5TB $80
Blue is cheaper but less space:
Western Digital Caviar Blue 1TB $65
Then of course the Black drive:
Western Digital Caviar Black 1TB $77 (32MB cache, not that it matters much)
I guess for only $12 extra it couldn't hurt with such a budget, just saying it isn't needed. 2 year extra warranty is nice, it's also louder if that matters.