Block RockiT and Q'nique long-arm machines are the best machines for the money that can be found on the market. They have a lot of different accessories that can really help make quilting a lot easier. I want to mention just two of the nine attachments that is included with the 9-Piece Attachment Foot set, the Glide Foot.
There are some of the really expensive long-arm machines that have a Glide foot or that can be purchased as an add-on. The Glide foot allows you to quilt over thick seams, quilt off the edge of you quilt and then back on without catching on your quilt top. This foot alone is worth the price of the set but you also get Couching Feet, Echoing Feet, as well as a Square and a Diamond foot.
The first time I heard about quilting with a couching foot I wondered why would you want to do that? After getting to play with the couching foot using Bernat Baby Blanket Yarn that we bought at Walmart it was so cool! It was like painting on my quilt. This gives you a lot of extra ways to embellish your quilt to give it that one of a kind look.
Here is a video that shows Kathy using one of the Couching feet:
