Curious what most have found to be enough psi for a 3 story house to
clean the siding? (I think around 35 feet to the peak)

IE: I've looked at some electrics that max out at around 1600 psi,
while the gas ones are around 2200 psi or higher...

I was thinking electric would be the easier one with less maintenance
etc.. but maybe not enough power?

Here are two models in particular:

Sistema 10102 CleanJet 1400 TSS
http://www.amazon.com/Sistema-10102-...4318373&sr=1-2
1400 psi, 1.4gal per minute, electric;

or

Briggs and Stratton 2200 psi
http://www.amazon.com/Briggs-Stratto...4318373&sr=1-5
Gas powered;

Thanks