I have had an A.R.E. cap on my 2005 Tundra for 11 years now and have been very pleased with my purchase. I don't know whether a fold-down front window is standard or optional on the models you are considering, but it is worth springing for.
Bird initiated a thread a few months back in which he requested input on cap brands. I haven't been able to locate that thread, but I don't recall any negative comments about A.R.E. I seem to recall that there was a negative comment about Leer, but I can't remember the reason.
BTW, congratulations on your new truck.
Steve
Edit
I found Bird's thread --
http://www.tractorbynet.com/forums/front-porch/348655-where-do-i-get-pickup.html.