well im looking at putting some new pickups into my guitar when i get home from afghanistan and was looking for some feed back on a couple of things:

1) what would be a good pickup. (I play metal and rock)
i've been looking at the EMG 81, 85, H4 and the Seymour Duncan Livewire Metal.

2) i would like to do the change myself so need a pickup that would be easy to change as i have never changed a pickup before.

any advice would be greatly appreciated. thanks.
The emgs or the livewires would be good for you, disregard the H4s though.

Changing them isn't really easy though, but its possible. If things get to complicated take it to a shop.