Ive been running a TRD stage 2 cam for about a year now in my 22R. There is a good improvement in power, but it is mostly in the upper RPMs. I have a weber 38/38 carb, PP'd head, and LCE header as well...not sure this is what youd want for a mostly stock EFI motor. My gas mileage also went down considerably with all of the engine mods, but its most likely due to my heavy right foot.
I also HIGHLY recommend replacing all of your rocker arms when you replace your cam...I learned this the hard way once and it is a PITA to have to redo.