Radiator shopping

[PapaJbbq]

I'm looking for a radiator for my 66, soon to be powered by a 350 Vortec making around 380hp, with air and auto. I'll be using a clutch fan and will fab a good shroud to fit whatever rad I get. I want a good rad that'll cool for a budget price. A lifetime warranty is a must.
In reading old threads, it looks like wide tubes in the core are better than narrow, ie 2 x 1" is better than 3 x 5/8", so I've narrowed my choices to:
Champion radiators.com 2-row 3/4" tubes $194.98
Speedcooling.com 2-row 1" tubes $297
Championcooling.com 2-row 1" tubes $269.95

I guess the headscratcher here is why are there two businesses with nearly identical names? Any feedback on these choices, or any other options in this price range?