I'm doing mine with AN fittings and hose, I ordered my radiator with AN fittings on it and I'm setting up my water pump with stuff from these guys:
http://myworld.ebay.com/ebaymotors/custombuiltmotors/
Rodger from Ironworks is an XRP dealer and hooking me up with the stuff for the plumbing. Goodridge has some cool ends too in black/brushed and a hose with corrugated Teflon liner (XRP does too). It will last forever and never leak. It's not the cheapest route but it looks awesome.