The concensus always seems to be that the LT-40 is the best trainer, and the Tower Trainer is the best trainer value.

All the rest are good trainers, and I think it comes down to personal preference and/or what is on sale.

I think the Eagle II is probably the best looking, with the clear windows, but that also makes it more fragile.

I trained on an Alpha 40 (before DSM2) and it's also a great trainer. I don't think the ARF has the same appeal as the RTF does. The RTF has the bragging rights of coming with the Spektrum radio.

I don't presonally like the looks of the Nexstar, but a lot of guys do.

Good luck