I like the ST 300 better so that would be my recommendation. If you like the 300 plier head but want a Surge you might wait abit as I spotted a Surge with the 300 plier head on ebay a few weeks back. So maybe they`ll be out before long.
Yeah, what everybody else said. If the knife is the #1 priority, go Surge, if not, go 300!
It is rather good isn't it?