I ended up going Mishimoto aluminum radiator, FWIW, fit was excellent and the welds all look very, very good. I hope I don't regret it! Only slight mod to the install was the addition of some closed cell foam strips on the sides to close the gap to the fan shroud.
@highonpottery and others who went Mishimoto aluminum rads, do those rads have the trans cooler in the bottom tank? If yes, all fittings work no issues? If no coolers, are you running a separate air cooler for the trans?
I would disagree on your assessment of the OE quality rads, those that are sold in the Toyota box I have not heard one complaint. (I read maybe the last 1.5 yrs on this thread), there are some people who have "heard" that some Toyota service departments substitute CSF for the Toyota version to...
"Way off" ok, maybe my point. After Toyota OE, there's very little consensus on the quality of available radiators. With some shopping you can get the OE for <$400.00
I really like the idea of a quality aluminum radiator, but, the ones I can find that at least address quality/performance are $500+