Most of time APC's numbering system makes sense. A SmartUPS 3000 is 3000va, A SmartUPS 5000 is 5000va, however a SmartUPS 1500 is NOT a 1500va unit.
When APC rolled out the black 3rd generation SUA upses, they upgraded our popular SmartUPS 1400 2U rackmount to a "SmartUPS 1500" (SUA1500RM2U) Yet in actuality, its a SmartUPS 1440. I've been wrong for years.
So when people call demanding the newer 1500, I will remind them its just a black 1400 with a squidgen more power which I charge at least $50 more dollars for.
Anyway, still the best bet is that 1400 2U (402), but if you want you can get the black Dell branded 1400, (402c) for just a bit more.
Anyway of you really want the "1500", its here. But if you want a real 1500va, BestPower makes a great one.