I just got a Juki it is a straight stitch only. But man does it fly. I stipple quilt all my quilts myself and I almost can't keep up with it. Check it out the Juki tl98q and the new one is out now and it ranges 1200$ to 1400$.I got the last TL98q at the local quilt shop for 900$
if you get a regular machine just be sure the motor is fast enought to stipple. My singer was not fast enought to stipple very good.
good luck to you