I have used the Seaclone in the past with pretty good success. It is fussy and has a long break-in period. But it did work. That said, I also agree there are much better skimmers available. Upgrading is never a bad idea if you have the cash and want to make a change. If you are happy with how things are now, why bother.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian