At this moment I have a Euro Pro that is my take with machine because of weight its very light and has enough stitch options & accessories to hold me over till I am home. My everyday do all machine is my Janome MC10000, I have had this machine 6-7yrs now and still haven't used every stitch or embroidery design available on it. I do alot of FMQ on it. I also have a Juki which I use with a grace quilting table for quilting, love its speed & its a work horse also a great machine for sewing very heavy or layers & layers of fabrics.
But honestly I think its what you become comfortable with I learned on an old Singer trettle and there really wasn't much I couldn't do on it except all the fancy computerized embrodiery stitches, I did do monograms & even some fancy embroidery designs using a small wooden hoop and free handing it. Just took lots of practice. I did have a great teacher she would make me sit and sew circles, squares, zippers & button holes till I was blue in the face before she actually let me make anything real! LOL Wasn't until I sewned my own finger then she said ok your are now officially a seamstress! LOL
My best advice is test drive them before you buy and make sure your dealer is reliable for service. So far I have only needed limited service on my machines although I clean & oil mine regularly myself.