I recently "graduated" from a HandiQuilter Sweet 16 (sit-down model where you move the fabric), to a Baby Lock Coronet (machine moves, fully regulated, etc. - just like a long arm, except only about 7' long instead of a monstrous full-size long arm.
When I'm working on an intricate pattern and need to sit down, I have a padded bar stool that puts me at just the right height. If I have a quick-traveling pattern (overall, meander, etc.), then I stand up.
I cannot say enough good stuff about the Baby Lock Coronet. Just make sure to keep the bobbin track cleaned and oiled and once you get your tension set for the thread you're using, it is a very, very dependable and consistent machine. All kinds of options to choose as well as an array of typically-expensive (any brand) attachments. I love the ruler base that attaches as wanted, though it will cut down the quilt area (length) about the width of the base.
I'd urge you to go for it. You should be very happy with the BL Coronet.