I have two Juki machines - the 2010q and a F600 - and love them! If you can swing the $$ and can get by with only a straight stitch I would go for the 2010q. It is the perfect machine for quilting in my opinion! I have talked to many happy quilters who have this machine, it is so solid, has a beautiful stitch and the size of the throat and especially the height of the machine give you lots of work room. And it is so fast! I feel like I will be sewing on it for many years.
But if you need other stitches too I'd go with the other model and start saving for your second machine.