In reply to David Cowley:
If you're planning on going out by yourself then a bigger pad is probably a good idea. Personally I'd spend the money, it's like anything - buy cheap, buy twice.
Any of the big names will give you a pretty decent pad but personally (because I'm a bit of a brand junkie) I'd recommend either SNAP or Moon.
In order to provide a balanced (and therefore possibly less helpful) post I would just say that I have mates who have gone for the Alpkit "twin pack" and they have been very pleased with the performance they're getting for their money, plus you have two separate pads to help better deal with those awkward landings.