I LOVE my serger. Do your homework and find the one that has what you want at the price you can afford. Mine is really OLD now and I have been looking for replacements....they are expensive....so make sure it has what you want. I like a rolled hem, that feature can make nice baby blankets, napkins, table cloths etc. One with a dual feed would be nice, that works similar to a walking foot on a regural maching, both fabrics feed together.
Have fun, and let us know which one you choose.
DD