rockband / guitar hero instruments

I'm new at this and been trying to research and find out which instruments to get. I see there's alot of things about compatibility between rockband and guitar hero and am really confused since there's a lot of old info on google and it, it isn't really helping. Can someone tell me which guitar and drums to get that will work for both rockband and guitar hero? I here rockband guitars have more features but don't work on guitar hero? I'm looking for just decent equipment that will work, I don't wanna shell out 150-200 for ION drums, just something compatible with both brand of games so I don't limit myself on which games I can and can't play. Thanks in advance!

If you go to Rockbands website you'll find a compatability list of what instruments work on what games, usually even though they are competitors each other's peripherals work on each others games, usually.

Or just type Rockband compatability into google.

http://www.rockband.com/compatibility This should answer you question.