Colby,
I've got one of those Safe-T planers and while it is great at rough thicknessing necks etc I too find that it can leave swirl marks that take for ever to buff out with the RO sander. For thicknessing tops and B&S sets I guess a thickness sander is the bees knees, however for the number of uses it would get in my workshop I couldn't justify the $900 or so for the smallest model. I've found that a good mid-step between the Safe-T and the RO sander is a drill press sander similar to the one made by John Gilbert, see David Schramm's online apprentice web page.
I had my engineering department at work make me a set for different grade papers with a chamferred edge to facilitate feed. They did a fine job on the two sets of Bubinga and all the other woods I've used them on so far. And, $900 buys a lot of wood!
Colin
John Gilbert ThicknesserColin S38378.4133796296