www.audiolot.com
www.pacificastudios.com
The first link looks more like a store than a recording studio. The second place just says protools, unless I missed their gear list.
Choosing a place that has gear (or access to gear) that you don't have or cannot afford but really want to utilize is a good criteria, but more importantly, it's the engineers who work there. There's more to recording then being an avid knob twiddler with a large ego. Just because someone talks a good game, doesn't mean they can actually make a nice recording.
Mastering is the same way, except to an even more finite level.
The way to decide where you want to record, and who you want to engineer and master your recordings, should be based on example work that the studio/engineers should be able to provide. If they just drop names, that's nice, good for them, wish them a nice day and go elsewhere. I don't know of a studio that would let you leave with a recording to evaluate, most studios will demonstrate their work in person, and be able to tell you something about the techniques used, things that went well, things that didn't go well, and so forth.
That would be my criteria.