If you like the character, I would definently recommend Walter. He's really well made, as long as you can find one with a good mouth. His suit is very nice quality. If you are a fan, he's worth picking up - espeically if you can get a couple bucks off.
In my opinion, the Star Wars figures are way too expensive. At about $11 a figure (2 pack), that's pretty pricey considering their size. I really would like to snag the PVC set if I can manage to get my hands on one. There is a really nice Muppet Theater backdrop on their Craft site, and the two would go great together.
I'm really toying with the idea of modifying the DS Gonzo. His arms are way too short, and there is something about his face that seems... off. Other than his Nose/mouth is blue. Something about his eyes. I really think they should have gone the plastic eyes route, particularly with Gonzo and Beaker.