any of you guys & gals use a pump of more than 1hp? today i went to checked out these pumps Groundfos & Tsunami, the sales lady recommended me to use >1hp for 4 bathrooms, is it overkill? the price different between these 2 brands are very high between 700 - 1000.
for model
Groundfos CM3-5X (0.75hp) $1450, CM5-4X (0.9hp) $1710 & CM5-5X (1.3hp) $2400.
while
Tsunami similar spec with Groundfos (1hp) $1000 & (1.3hp) $1400.
All prices without installation.

any place more cheaper?