Question on PB's pump sizing

[txborn]

Got a quote for an IG pool. Due to easement restrictions, it is a small pool/spa - about 9,000 gallons. Here are the specifics:

Hayward 60 sq. ft. DE filter
2 Pentair surface skimmers - separate pluming and valves
Polaris 280 with booster pump
Waterfall with 19 foot weeping wall
6 foot diameter raised spa
2 1/2" skimmer and main drain lines
6 adjustable water return inlet fittings - 1 1/2"
2 HP Hayward Northstar pump single speed

After reading many threads and doing research it seems that a 2HP pump is a bit overkill. PB said the spa needs that size (6 jets) and using that pump for filtration/circulation will allow a minimum pump run time for pool turnover. Also said I can't run waterfall/weeping wall at the same time as the spa. He said he will put any size pump I want but is sticking with the 2HP 'cause of the spa.

Could I get a 3/4 HP pump for the pool filtration in addition to the 2 HP for water effects/spa? Or any other advice?

Thanks