Turbo Trainer

I've a perfectly good Mountain Bike sat in the garage doing nothing and am not at all a confident cyclist.

I've been looking at Turbo Trainers as I'd be quite happy sat cycling in the house - especially in this terrible weather we are having.

I don't want to pay too much but don't want rubbish either - anyone any advice on what to get and where from?

Wiggle looks a decent site

Don't get a turbo, get some rollers. I know you said you're not confident, so they may seem a bit daunting, but the curse is equally the blessing - once you've got the hang of staying on them, you'll handle anything the roads can throw at you . 

The hardest bit is getting on, set yourself up near a wall, and you can keep a hand on the wall until you're pedalling and balanced, and reverse the process for getting off.