Linear tracking tonearms.....

look at the kuzma airline. i also use a TT2, on the same table with the kuzma. the mechanics of the clearaudio make it more noisy than the kuzma. both great arms. i use an insider ref on the TT2 and a dyna XV1t on the kuzma. i tried swapping carts on the arms and the insider sounded awful on the kuzma.
the TT2 need a cart with very low compliance, where the kuzma isn't as critical of that. so your choice of carts should influence which arm you buy.

lewm, the TT2 does put a mechanical lateral stress on the cantilever. i have tried carts at extreme ends of the compliance spectrum. the stiffer cart tracks consistently. i had a VDH colibri XGP, which has a compliance int the 30's if i remember correctly. the cantilever was being skewed so much that it scared the crap out of me. i thought it was going to snap off. i ust the clearaudio insider ref on it now. there's little to no lateral movement of the cantilever. a koetsue rosewood signature performed similarly.
the lateral transport tube is noisy. i have it wrapped in blue-tac. i will be replacing the bearings with teflon bearings in the next few months. the resonation comes from the metal bearings moving the quartz tube. seems to be an obvious design flaw to me.