Hey Gal and welcome to Houston. I live in Pearland which is just south of the Medical Center but I can point you in the direction of a few great vets -- mine is in town (Houston).
I love my groomer, but she is in Pearland. I've had decent results in Houston, but some are just really "proud" of themselves with their prices and quite honestly, their work wasn't "all that"!
Let me know what area of town you are in and I may be able to help you. Houston is HUGE!
BTW....my Yorkie-Poo's name is Tyson too....God bless him...he's 14.5 and doesn't look, nor act a day over 7!