The timing belt won't affect power but yes you should do it soon unless you have a few grand burning a hole in your pocket to rebuild your engine. AC typically take about 10% of your engine's power, though of course it depends how much HP/TQ your engine has. In a car with as much power as yours, you'll only notice a slight difference between when the AC is on or off.
I don't understand what you mean by this statement:
"Getting around I traffic is causing me to rev it over 2000 rpm to what I feel is safely get through intersection."
Also can you give a little more info like when did this start happening, did it change at all since it started happening, does it happen under all conditions (car cold, hot, different gears, etc)?