The guys at Newport seemed fine, although it didn't sound to me like a deposit with them came with a firm committment as to MSRP, or what that price would be (I may be wrong about this, as I didn't really grill them on it because I plan on sticking with Symbolic). The receipt for my deposit at Symbolic states that they intend to sell the car at the MSRP, which as far as they know was and is still $38,500. So that's what I'd be looking for from any other dealer, as well. Obviously the benefit of a deposit at Newport would be a better position in the list...which is important as well.
BTW, have you taken your kart to Amago raceway, in NE San Diego County ? That's where I've done most of my karting, it's a nice little track.