This isn't STW
Whoops...
Thanks for all the thoughts guys, appreciated. Realistically, I don't need any of these bikes, I have 3 other MTB's to choose from (modern big full-susser, 'retro' Ibis Bow-ti and a SS ti frame). Whichever one I keep isn't going to get a huge amount of riding, but I'd love to keep one (almost for novelty sake) and have it there as a silly light and fun XC SS... all three of these frames can be built this way (I have a WI eno SS rear wheel).
I'm leaning towards the Land Shark, simply due to it's rarity/uniqueness (plus I can get a brand new paint job from John Slawta for just USD$425 at some point... the Klein is cool, but not exactly uncommon (it is expensive to replace though...) and the Ibis is fairly common as well I guess... aaargh, decision decisions...