Sewing Machine Recommendations?

My New Michley LSS-505 Sewing Machine

After sewing on my cheap small Michley sewing machine (see above) for a while, I’m considering getting a simple, but less toy-like machine. My Michley LSS-505 a pretty decent sewing machine for the price ($35); it gets basic stuff done, it’s super easy to carry around (only about 5 lbs.) and can run on batteries (no need to plug it in)… but I think I want a faster machine that can handle thicker fabrics (or more layer like in a quilt) and be able to attach a 1/4 inch or walking foot.

Any suggestions or recommendations? What sewing machine do you use?