Personally, I wouldn't suggest Integy components unless you intend on your rig being a show truck (like RevoMe's rig). I had a set of the piggyback shocks and, well, they didn't exactly hold up as I had hoped and I truly wasn't even bashing that hard to begin with. What truly steamed my shorts about Integy was their customer service, however. They essentially treated me like some idiot and were very disrespectful, so I think that's what turned me off Integy more than their actual products.
Integy makes good look stuff, but in my opinion, all it is is good looking. The stock arms and hub carriers are actually very, very good on the Revo, so until they actually do break, I'd hold off putting money into RPM arms (unless you find a great deal on them.)
Tekno is another manufacturer that makes good stuff for the Revo as well.