With all the sergers on the market how do you know which one to choose? The easier to use the better it would be for me but I can't afford the $$$$ ones. I am looking in the market of about $300. Would I just be wasting my money for one at that price or should I bite the bullet and get a better quality? I have been sewing more dresses for granddaughters lately and would like something that finishes my seams. Any suggestions?? Thanks for your time.