I've still got to pick up....
-Maul double bladed
-Palpy if they ever do it
I think at that point I'd be FX sabered out... Maybe a QGJ would be buyable but it's not a necessity to me either, I dunno. I'm not going for an ANH Luke though since I consider E3 Anakin's that same saber... I would only consider buying newer models if they were a substantial improvement like removable blades and stuff... These are cool higher-end collectible that's still semi-affordable.
I really want an Obi EP3 as well, but I also really like the Obi EP2 one that is coming out next year. I'm kind of like you, after I get those two, I'm considering my collection complete. The Yoda would be really cool, but I'd have a hard time convincing my kids that it's not for them... Since I'm throttling back on my action figure/vehicle purchases next year, I'm hopefully going to be in a better position to get these.