ill tell you what i know- sergers are a wondeful contraption!! they sew, they cut, whats not to love!
BUT- dont get the cadillac of machines like the baby lock with the jet air threading, ive read about it, and most complaints are with that type of serger, that if the air goes out, you cant thread it..well..fer cryin out loud.
i bought my brother on amazon.com just before christmas, for $198.00- FREE SHIPPING! do yourself a favor, dont go for the high end stuff, jus cuz it would be nice to have, do your homework on all the models, brother, janome, whatever. find one thats in your price range too, i know the vikings are waaaaay overpriced. even if it doesnt have all the bells n whistles you want, sometimes a compromise is good!! good luck!
katz