I am the OP and I submitted my post in November of 2007, shortly after purchasing our Sabre 31RKTS.
I wanted to report after 2 1/2 years and scores of trips including a cross country trip from North Carolina to New Mexico, we still love our Sabre. It's been pretty much trouble free; haven't had to return to the dealer or any RV shop. Still tows great, no water leaks, and everything still works. I am on my 6th Concertone, but the present one is a year old and working great.
Any questions I had, I've received prompt responses from Sabre. Still enjoy looking at other fivers, but the Sabre by far is still the best value.
2013 Palomino Columbus 320RS
2007 Dodge RAM 2500 6.7 Cummins
Reese 15K manual slider
M.I.L. in Florida for good!!