My opinion is to tell your pro shop to take a hike. Do they HONESTLY expect you to buy a $700 dollar bow w/out ever being able to shoot it first?????

But to answer your question, it depends on what you want. The Vectrix is a little faster, but the 38 Ultra w/ Cam and a halve's is a little smoother and I think it's a littel quieter. My shop owner has a 38 w/ the Vector cams on it, and that is one sweet shootin bow.....You're between the perverbial rock and hard spot....There is NO WAY I would tell you which would be the better bow....no way......Some how, you've got to find a way to shoot them....It's a coin toss......Glad I don't have to make that decision.