Ok - the bog standard 2240 is quite cheap, but once you start adding bits to it and customising it, the costs can spiral wildly out of control, to the point where you could have bought a very good quality target pistol instead. For some (like me!) the modding is all part of the fun so I don't mind so much that I have ended up with some very expensive CO2 guns. If you are a practical sort who likes to tinker then it may be for you. If you are looking for a solid single investment then it may not. I have to disagree with Aimstraight in that I think the problox are absolute crap. The only sensible way of geting a scope or red dot on a 2240 is to buy a metal breech, which incurs further expense. Standard metal breech and new probe will run you about £50. Multishot breech the best part of £100. 2240 triggers are also crap as standard, sorting that out is going to cost you extra.
Don't get me wrong, I have three 22xx guns and am currently building a fourth, but it does not represent value for money; you really need to know what you're letting yourself in for.
The new CP1 is basically a re-engineered 2240, but with proper sights and rails, and an acceptable trigger from the get-go.
As far as power goes, nearly all of the revolver type multishots (including the umarex 1911 and CP88, because internally they are revolvers) are quite low powered. 3 ft/lb would be very good for them. But that's not really what they are all about.