I know someone with this machine, in the 9" throat, and although she has done quite a few quilts with it, she has quickly outgrown that size throat and is frustrated now. She tried unsuccessfully to sell it last year for $1000.
My advice to you is to test drive as many machines as possible, research as many machines as possible, then buy the biggest and best you can possibly afford, so you'll be happy with it for a long time.