I was in exactly the same position myself six months back, did all the research on here, brought loads of mags, went to the gun shop with the intention of getting the 97k, ended up comming away the Theoban Evo, just my personal choice after handling all three of the guns you mention above. No doubt there all top notch guns, but i didn't get on too well with the anti-bear trap thingy in the AA tx200 and was a tad heavy for my liking, the 97k, only thing put me off was it seemed to give off a fair old CRACK when fired, perhaps a better silencer would solve that?
The Evo was my choice, nice weig