New Camera - What to buy ?

I currently have a Canon S50 in Canon housing and Inon D2000 strobe.

I'm getting some quite good results (I'm still learning) but find the AF and shutter lag to slow. I'm also finding the F stop range a bit small on the camera.

I'd like to upgrade to something faster with a better lens. I don't want to spend too much and would like to get something that I can use my current strobe with.

Is there any point in changing for another compact or will I only get the speed from an SLR (which I can't afford at the moment). And if so what should I look at?

Thanks for your help.

For your complains there is no point in changing to another point & shoot, try an used DSLR rig.