GH or Rock Band?

So this christmas i am going to ask for either GH or Rock Band, but I dont know which one. what would you recommend? thanks for the input.

Rock Band 2 has around 500 songs availble and Guitar Hero World Tour might have around 150 (not sure about that)

so I would really encourage Rock Band

Well as A drummer for 5 years i would say

the GHWT drums are Great

There is some trouble with sensitivity but theres an easy fix when activision send you a midi cable

I really like the velocity sensitive bit

With cymbals aswell

So id say GHWT

Played both

Prefer GH