I have a Janome 1600DBX, it is a mechanical maching, no fancy stitches, no embroidery, just straight sewing. However is does have a 9 inch harp. I have quilted double size quilts on it. Go to Ken's Sewing and check them out, I think they are closer to your price range.
Personally, I would think twice about going to Arbuckle's.
JulieM
PS speaking from experience, sorry if this offends