I have a 16" Amp B3 frame if thats any good? British racing green, all in very nice condition, CRAZY light for a full suspension frame, feels lighter than my 2004 Explosif frame.
Sorry, but ideally it has to be the twin downtubed B2 I'm afraid as that's the one I remember drooling over!
I just sold mine, the frame and fork together are lighter than a GT LTS I acquired recently. I also sold a Mongoose Amplifier not that long ago - very nice indeed they are too. If you need a white decal set, let me know as during my restoration I had a few extras printed.
On the RTS side of things, I have a team that is not leaving the stable, but I also have an RTS-1 (I think), which is practically the same thing, and has the noleen piggy back rear suspension and cro-mo rear stays. I may be tempted to sell it in the near future to fund what have now become a long list of annoying things that keep going wrong in life (cars, roofs, trees in the wind falling dowm etc etc).
Can't help with a Manitou - never had one, love the look of them, but would be too scared to fit a headset and BB in one, let alone actually ride it.