I know the debate on belt drive vs. direct drive will still continue, but, decent quality direct drive units are less than half the price of the belt drive units. I have one of each, and honestly they both function well and get the jobs done identically. I got seven years out of a direct drive unit, including at least 400 deck cleanings, and many dozens of house washings. It was the Honda engine that finally started chattering and knocking, and the Cat pump is still working fine. Unfortunately there is no cost effective rebuild for Honda engines.
Now, I don't expect the belt drive unit is going to last 14 years, so I'd say in the long run, it's cheaper to just replace the direct drive unit even twice during the life of a belt drive, and bank the rest of the money.
I'll probably catch flak for this, but based on my experiences, I'd buy direct drive every time, it just makes better economic sense. This is based on a cold water unit, and hot water units may be a totally different situation.
Home Depot sells a dandy 13hp Honda, with Cat or AR pump, 3500 psi @ 4gpm, for $999.
Very hard to beat.