Oh man, you BET IT'S WORTH IT! Man, I couldn't even image going back to earth where the mere Air-cooling newbies dwell! No really, it's worth the OC"ing benefits and heck for me I just like coming in, turn stuff on and looking at all my stuff thinking "hey, I BUILT all of this and it kicks ASS!"
DO IT! 
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XP 1600+ AGOIA-Y (GreenLabel, UNLOCKED!@/ NF7-S 2.0/ PC 2700 DDR
10.5*172FSB(1806/ 1991 high), Vcore 1.792...@84.95Watts
--86' Chevette Heater Core
--1/2" Vinyl tubes
--Via1300-Stealth Mod(QUIET!) 
---Home made copper-tube block
---PVC small internal res
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