Ones results will of course will depend on the gear but in my Doshi phono stage the TELE ECC801s rule. Very clean, revealing, transparent and dynamic. Be careful though because NOS sometimes equates to OC (old crap). A lower priced but also very good alternative to the TELE is a Mullard CV4024. Very similar to the TELE but a little more colored and not quite the same frequency extremes.
Have also used Mark and Kevin and have had nothing but excellent service.
Have also used Mark and Kevin and have had nothing but excellent service.