Well before i re-did mine, I was getting 288 with a 337grn arrow, 65lbs, 27.5"DL, speed mods. Now Ive gone to a 350grain arrow, at 28" DL, havent chrono'd it yet, but I'll let you know when i do, it may be today.

As far as the speed mods, you wont feel much a diference at all, the extra 6-10fps was well worth for my stubby arms.