7'5" square is a big tub. Were you looking at the Grandee purely for the size? Because their are plenty of other tubs out there, but the HotSprings will be one of those brands at the top of the food chain in terms of warranty, features, energy-efficiency, etc.
If you are willing to Sacrifice those things, you could look at the Hot Spot Tempo (has a damn lounge though.) That is a 7'5" tub that can easy sit 6, with roughly half the price tag. Or, I would take a look at the Limelight Pulse which is wedged in the middle of the Hot Spring and Hot Spot.
Or the Jacuzzi 200 series, I like to J-280 quite a bit!