Don't normally make a habit of posting on PPRUNE but for this one I had to. I can't talk for JA but Ad-Astral's IR is first class, did mine there only recently. Aircraft/airport/sim are all minor considerations to which instructor's are on the books and AA has some of the best and most experienced.
In my view it would be extremely hard to beat AA for value of money or quality of training.
My 2c
MHA