I agree with the previous poster, the best thing you could do is to look through the site and check out the reviews and pick some one who suits your tastes who is well reviewed. If you do not have a VIP membership, the couple of bucks it costs are well worth it to get the full value of this site and the information that's availlable. It would be akin to buying a good guide book before going on vacation: it'll help you make sure you see the sights you want to see!
That said, there is something to taking a bit of a risk, especially if it involves a particular favorite. Case in point: I've always been a big fan of Alana Evans and she provided for about 15 minutes a few years ago. She had no reviews but I figured what the hell. Well, I'm glad I did, we had a great time!
I also took a cursory glance at which pornstars are available in NY and two leapt to mind as likely to give you an amazing experience. The first is Venus/Angelica Costello. I love her to death, she's fun, down to earth, still hot as hell and willing to do ANYTHING! She can be a bit flighty and from what I understand these days, can be a challenge to hook up with. If you do, however, she's likely to rock your world.
The second would be Nikita, who travels to NYC on a regular basis. She's just as she's described in her reviews, one of the most beautiful women you'll find anywhere and has mad skills!
As to the numeric issue, I would tend towards keeping it simple, especially for the first time. I fyou have chosen someone who's an ATF, that will almost assuredly be enough to accentuate the experience. Plus, one less participant reduces the possibilties of issues by a third! Now, the multiple partner thing certainly has it's charms! As I've related a time or two here before, the first time I hooked up with Nikita and Alexandra Quinn remains the most amazing evening of my life! If you do decide to multitask, I strongly suggest that it be two girls who've worked together before and are comfortable with each other! (Which, I know for a fact, Nikita and Venus do!) Otherwise, the chemistry may end up killing the momemt! Finally, don't get crazy, three is too many! Tried that once (Nikita, Venus, and Summer Storm) and it was a sensory overload! The players were able and willing, it was just a little too much, at least for this trooper!
Finally, and this is always my advice to anyone on this board: trust your instincts! Even if it's someone you're really into, if it doesn't feel right, don't do it! There's plenty of girls out there who will fit your bill, take a little time, do a little research and let us all know how it works out!