Add air conditioning to the room where the computer will be, make sure there open access to the computer not in a closet or drawer and everything will be fine.
Don't invest in water cooling, unless:
You are gonna go for a land speed record by over-clocking your CPU and Graphics card. It just isn't worth it.
You just wanna do it to look cool...then just do it.
Soyo Dragon Ultra Platinum Edition powered by a P4 3.06GHz w/HT @ 533FSB
ATI Radeon X800Pro 256DDR <---Yeah!!! I finally got it!!!
1024MB PC3200, Creative Audigy LS, 2 x 40GB = 80GB RAID 0
Windows XP Pro, DOOM 3, CS, UT2004, BF1942 RtoR, CNC Generals
Finished Half-Life 2!!!!!!!!!!