It looks like you made your decision, but in case any others check this thread out and want more input...
The Sankei ones I got from NAPA have lasted me about 34k miles and are going. They might have been going sooner, anyway, but I noticed looseness with the ITR on the passenger side (confirmed for me by shop) and torn boots on the OTREs. Supposedly Sankei was OEM or close, but I was hoping for a little longer.
Use case is important though, and with an almost 3" lift, and the occasional wheeling, I'm not sure if I should be surprised. It seems like anything that touches the suspension gets trashed earlier with lifts and mild to moderate off-roading.
I am going with OEM ITRs from Amayama though since they're about half the price as the best prices in the US, even when you factor in the $30 shipping from Japan. I'll be getting OEM OTRE's from CamelBack since the price difference was negligible on those.
Good luck!