Your best bet is to get on the Prime Time Forum and see what kind of problems OWNERS are experiencing, not what others have HEARD.
More than anything, you need to find out what kind of warranty and more importantly, service from the dealership that you purchase from.
The RV industry is being inundated with new RVers who want all the bells and whistles, but have no idea what really counts - the workmanship. You will get all sorts of workmanship extremes (both ways) on any RV brand. Once you find what you want, go over it with a fine tooth comb, or have someone who knows to do it for/with you. That is how you can guarantee to some extent, not purchasing a lemon.