Linn LP12 vs Thoren TD350


I currently own a nice Linn LP12 with lingo powersupply, a Naim Aro tonearm and a built in Naim phono/pre with hicap power supply. In the opinion of the analog nuts out there, would a Thorens TD 350 with an SME M2 tonearm be an upgrade, a downgrade, lateral or just good but differnt. Going to the Thorens would also require the purchase of a new phono pre.

Rest of system ins C-j, Marantz and B&W. Music taste is varied from Andy Williams to country to Led Zep.

I am satisfied with the sound of my system, but like many, get restless.

Thanks for your input.
Regards,
Paul
pcs
I think it would not be an upgrade. It might be TD550. I had moved from Rega P3 to TD350 (with TP 250 tonearm and Benz ACE H) but I was not satisfied. When I changed TP 250 with Kuzma's Stogi ref, the sound improved appreciably. Now I have in mind to change cartridge Benz ACE with Benz LP. I have not heard LP12 but it is a "legend" judging by reviews. Both LP12 and TD 350 have the same construction, namely sub-chassis. LP12 can be upgraded with better arm and/or cartridge and better phono pre (see adjacent thread). Good lack!
A.
I would stay with the LP12 and look at investing in upgrades to it. Such as Cirkus bearing, trampoline, keel etc. Even a dealer tune up can do wonders if it hasn't been done in a while. I have a LP12 and a year ago wanted to "upgrade" or get something new. After looking at different tables, I still have and LP12 and am saving for a new cart and maybe a keel down the road. Also Linn just introduced new power supply and phone pre-amps that sound extra awesome. But they cost lots of $$$$