If you want to test drive Froyo I strongly suggest checking out CyanogenMod at XDA (
http://forum.xda-developers.com/showthread.php?t=735596). His RC1 is super speedy. It has a few things that aren't working but the ROM has been built from the ground up. 4G, HDMI and FM Radio aren't working and it does not contain HTC Sense and His development team (Team Douche) is working on fixing those items not working.
I'm personally getting benchmarks that are 2-3 times Stock EVO with 8-10 hours of battery life depending on use.