I have my older Pfaff serger. It is wonderful. Has 4 thread capability, chain stitch, and cover stitch. Yes, I have to thread it but with those little blue dental thingies it is a breeze to thread [and I have arthritis in my hands!]
It isn't computerized, was on sale [great that], and is a true workhorse.
I thought of upgrading but decided that mine was more than just OK ... it was comparable ... and I could then use that money for something else. The bells and whistles were just more money and not really a NEED ... and soon even downgraded from a WANT.
I got it from a LQS/sew & vac and had free lessons with it.
Several LQS's have used sergers as the owners traded up. So, if you have any budget concerns, you can look at them too.
ali