I just purchased the Juki 2010Q as my second machine. I love it and use it exclusively for straight stitch and machine quilting. It is very sturdy, user friendly, sews really nice straight stitches and love the bigger harp. I like the thread cutter. It also doesn't require you to keep pulling the thread out once it's cut before you start stitching again.
My other is a Bernina 630. I really like this machine, and have now been using it almost exclusively for machine embroidery.
I saved up for almost a year in order to be able to afford the Juki. Look around on ebay, craig's list and the Yahoo Group "Sew its for sale". Two weeks after I purchased mine (about $1K which included tax and a number of accessories), I saw one that was used, but very low mileage, on sale on Yahoo for about half price. Be patient and wait until you can afford what you really want.