Man so I have the chance end of month to see either one of my fav pornstars ever (kaylani lei) or a suuuuper fine UTR model.  Both about he same price, can only afford to do one or the other...

Since I don't know who your UTR model is I would go with Kaylani.

your nick-name for your left hand or your right hand?

i would go with who ever you think would help you work your kinks out so to speak. If that were equal go for most experience first.