Thank you very much for the responses!
NWFG and that Tomahawk sound good. I guess it really comes down to how many hours I want to do a month, which I'd like to think is about three.
3 hrs in the C150 would be £360.50 - with a desposit of £200
3 hrs in the Tomahawk would be £330.00 - no deposit
I might give the Tomahawk a ring as I guess after 12 months an extra 30 per month will add up.
Thank you guys!