the best system i know of and have heard about and seen running is the swiftech. www.swiftnets.com
it consists of a pump, radiator with one fan attached, the cpu block, and the vga and chipset blocks are available for it also. The kit runs about 150-200 bucks plus 50 bucks for the optional water blocks. But its the best that i know of. Also theres a kit from swiftech with an external back panel mounted radiator with 2 120mm fans.
P4 2.26 ghz, Intel d850emv2 mobo, 768mb of pc800, sony 4x dvd-rw, teac burner, nvidia ti4600 graphics, enermax 330watt ps
4 silent uv fans, cold cathodes in full tower antec case, round ide cables
SOny vaio 2.66 ht ghz modded into raidmax case with green cold cathodes.
P4 2.8ghz HT, 512mb ddr, Intel KD865gbfl, onboard video, raidmax case, blue cathodes, round ide, loomed wires, 4x dvd burner, wd sata 80gb hard drive
Intel d865perl, 2.8ghz northwood, antec sonata, wd caviar 20gb, Corsair 512mbx1 for now. 380watt psu, ati 9600, dvdrom cdrw floppy in black too match case