If you haven't already purchased the rock band drums, I would defintely recommend these. I got these for christmas, and after setting them up (took me about 20 mins) i popped in rock band 3 and was very surprised at how good these drums are. I had previously been using the Guitar hero World Tour drums, which were pretty good, but the red drum did break after a couple months. But the Rockband pro drums are very durable, and you can hit them pretty hard, which I do a lot since I play with a headset.
Definitely worth £100.