Singer, I've always used a Singer.
Singer 590 commercial grade, it's cheap, does what any other sewing machine can do. You don't need all the fancy stuff, like a computer screen and all that.
And think...if those fancy screens ever bust, you're going to spend a crap load on repairs on those high-end models. also, buy a model on if you have like...me, I have a Singer store right in town for repairs and cleaning.
And also buy when they do demo day. I bought mine when the fabric store was doing a sell and had all these people in showing what every machine could do and what would be best for needs.
Shouldn't spend more then $200 on one, that's a good price and they'll keep if you don't abuse them.