Having owned a DE SW, here's my $0.02. It is a cool game from a theme, artwork, and overall package standpoint. It is nice to have in a collection, guests like it, and it is pretty neat. From a rules and gameplay perspective, it is kind of shallow. So if you want it from a fan/theme perspective, great. Just realize that if you like games that are deep and challenging, this probably isn't it.
As for hearing bad things about DE and Stern, it is basically a Ford vs. Chevy debate. Everyone has their likes and dislikes and good/bad points can be made for and against DE and Stern.
Stern SW? If it is happening, we won't know for sure for a while. Right now the rumor is that Stern's next pin after Transformers is AC/DC and even that isn't known for sure. So the rumors of SW are even farther off.
Back to DE SW. They seem to be selling for $1800-2200. They also aren't exactly rare as they made a ton of them. And if you really want one, it isn't a hard machine to sell. So if you don't like it and Stern comes out with a SW pin, you probably won't have a hard time getting rid of it. I guess I'd continue to keep my eyes open and look for one in the $2000 range. If you want to pick one up for $2700 shipped, just be ready to take a few hundred dollar loss if you decide to sell it in a year or so.
I kind of miss mine. If I had more room, I'd have kept it. But it didn't get enough play by myself or my kids to justify keeping it around.