I have the
Sew Perfect Quilt Professional II, I've had it for about two years. I Love it, but I wish I had the room for one of the extension kits, because the table feels rather narrow when I'm trying to quilt (that said, I have determined that quilting on a domestic sewing machine is just not for me, not matter what gadgets I get). I found it easy to put together, but I like putting furniture together. It is VERY heavy, so you might want someone with some muscle to help you when putting it together and moving it around. It's a huge upgrade from the Ikea table I was using previously.
Edited to add: Occasionally, they'll offer tables on their Facebook page at a reduced price because the finish on the table top is marred or has some other kind of cosmetic damage. It's worth calling to see if they have anything like that available, because they are expensive tables.