If you're gonna buy another Jem, I suggest the VWH... just my prsonal preference. It's my dream come true. Of course I've never touched a Jem 10, and I know I'm probably missing out. I still think you should go with the VWH. One of the main reasons why I would say go for that one is you can get it brand new... It'll be more difficult to find a BFP or a LNG that's mint. But then again, I don't know if new, used, beaten to death, etc... is what your looking for.
Since you already know you want those three... get all three. Go with the hardest to find first, second hardest to find, and of course the VWH : )
You can never own too many, unless you're going without food and shelter, but even that's questionable, as long as your guitars are kept in a nice, warm place.