[MultipleParadox]

In the other hand, it's pretty much a moot point

You don't need a pistol to be particularly powerful, as you're most likely to use that in close quarters or at close range anyways

What you need is consistency and precision, regardless of fps, and you'll achieve that with mostly just a good hop up unit and rubber

In case you're worried about fps because you want range, head this:

I am working on a TM HiCapa that shoot in that range approximately (around 1joules using .25 or .28, didn't have .2 on hand for direct comparison), and hopup actually will over hop .28 at its minimum. When I fed it .4g (yep that's right, in a pistol :P), I was shooting around 175 to 200 feets easy.
Still haven't checked for accuracy yet, but at least I know the range is there even at "low" fps! :P