Thats a pretty good session for a first timer and going to alpha care. Alpha care is closer to the bottom 10 spas rather than the top 10 spas, so when you go to a top 10 spa you'll definitely be impressed. The biggest difference between spas is that in some of them customer service and general friendliness is optional. There are girls in those spas that will ask for the money upfront and then become extremely bitchy to try to get you to leave as soon as possible, and nobody tells them anything ever. In a top 10 spa, if someone has a bad experience they will try to make it right with the client and speak to the girl about it. So, you didn't know this but you actually took a massive gamble by having that as your first session and got a pretty decent result.
As for the recommendation, I will say:
http://premierspas.com/attendants/daria - I have no info on her, I have not seen her, there are no reviews. But she looks like a fucking slut and you can pretty much get bbj and dfk at pure spa all the time. She also fits your preference of natural boobs, I'm guessing you like big boobs, not A or B cups. Out of the big boobed, natural girls working I don't know who is hotter than her at a top spa. If anyone has other ideas please share.