I have an Innova stand-up and love it. I think in another post, folks mentioned the differences and preferences between a sit-down longarmer and a stand-up longarmer. I am a stand-up one.....I tried a sit-down machine at a quilt show and just could not make my mind and arms work together to do a good design. I'm thinking with practice, I could do it. I love the stand-up because:
you don't have to baste the quilt sandwich together (just load it on the frame)
you can free motion, do ruler work and do pantographs
you don't have to maneuver the weight of the quilt as you quilt
But, as everyone says, you need to test it out and see what works for you. Have fun looking!