RE: Realistic goal...20 fps better with new bow?
I do not think you will get much better than you are getting with your present setup. If you really want to know whats going on with the newer bows, I would suggest takingyour arrow to a pro shop, have them setup a few of the bows you are interested in to your draw weight and length.Thenshootthrough a chronograph.Just remember this takes quite a bit of time for the pro shop so if you buy make sure you buy from them don't just use them, then buy off the net.
The X-Force will probably get you the speed your looking for. The X-Force is fast but it is fast because it has 60%-70% let off and dual cams so you really can't compare it's performance to single cam bows with 80% let off.