I've ran a used 05' turbo for a full year now. Many 1/4 mile passes, a few trips towing 10k, and a few highway WOT runs up to 51psi boost. Compressor still feels tight with minimal side to side play.
These HE351cw turbo's are pretty tough. Probably last 300K if you never go over 35psi boost.
i aint hooked it to a sled but with out the smarty and with the quad alone it ran cool i can't really stomp it right now with the smarty until i get a lift pump