I've heard many people love their Brother machines.
I don't know which model, but I'm sure you can find one that fits your budget and works well for quilting. I used to work with a woman who quilted on her lunch hour and she had a Brother that she just raved about.
It wasn't that expensive and she said she could quilt on it, sew jeans with it and do just about anything she wanted with it.
I wish I could remember which one but there are a lot of people on this forum that use a Brother very happily.