+1 for Lochan Ora. Everyone is really nice and the place is taken care of really well. Not fancy, but definitely gets the job done. I prefer this place over Diamond T.
Not sure if you want something close to where you live, or if you are looking for certain amenities but here are some others:
Flying Ace (Rock Prairie Rd, east of the bypass)
B7 Stables (polo barn out on Graham Rd., west of Wellborn Rd)
Carousel Acres (Wellborn Rd., Koppe Bridge Rd. area)
Cowboy Country (Tabor Rd. area)
And there's a place out on OSR, east of Hwy 6. Can't remember the name, just know the guy who runs it is George (I have his number in my phone)
Cowboy Country and Flying Ace have houses for rent in addition to stalls and turnouts. There's also OSR Lone Star Ranch out on OSR near Lake Bryan that has a few duplexes and a really nice set up for the horses. You have to be a tenant to board.
Hope this helps!