I bought a cheap all aluminum one, it leaked the first time I installed it and the radiator cap has never seated correctly. You get what you pay for, and at the time it was all I had money for and could get it fast.
Edit: Just went looking and found it was a Silla.
04 TJ - 2 KC Daylighters, 35x12.5x15 MT/R Kevlar, 3" coils, Rear 4 link, 1.25" JKS BL, 1" JKS BMML, 33 Eng. Hi-Clearance Skid, 8.8 with LS, D30 EZ locker, OBA