The PB we are leaning toward is pushing fix speed 2-hp pumps. We are building IG, pebble pool with large spa and water feature (approx 22,000 gal). PB does not like 2-speed due to the reduced flow rate (less flow/less filteration). His argument against VS is the same plus the intial cost factor. We do not want to add cost to the build if it isn't going to be used, but we do not want our electrical bill to be out of control. PB is going with all Pentair equipment.