I'm shopping for an 800 MHz yagi, 2-3 feet in length max.
Well, that's going to rule out the ham radio brands.
So, depends on your budget and how much you want in the way of bragging rights.
Personally, I'd go used, since there's not really a lot of ways to screw up a Yagi antenna without it being obvious.
If I recall your earlier post, we've already ruled out Wilson as being junk.
Budget friendly but still a good antenna? Laird is a good choice.
So far I'm impressed with the EM Wave mobile antennas I have. Never tried their base antennas.
PCTel has been a good company, and they've been around for a while.
Larsen has always made good stuff. Usually can't go wrong with them.
RFS is a really good company, but starting to climb out of the hobbyist price range.
Sinclair, Telewave, Comscope, you're really climbing the ladder on the budget there. Not sure I'd spend that sort of money on a residential install. For a commercial site, sure.