I have been quilting for just under 3 years, and I have only quilted on two machines, so I may not have the "experience" to advice you really. That being said, I have a Pfaff expression 2. and I just love it. It cost around $1500, and I did buy it locally so that I could have it serviced. I am very happy with it. What sold me was that it has a built in walking foot and a bobbin that I can't put in backwards.
I think not being in a hurry and trying out lots of machines is your best bet. Take your own fabric with you, so you can really feel what it is like. I hope you enjoy the hunt.
Dina