Rega P3 or Thorens TD 166 MKII ??

I am trying to decide between  a Rega P3 with an Elys cartridge and RB300 tonearm from eBay in mint condition and a Thorens 166 MKII and Ortofone 10 super cartridge from Dave of Vinyl Nirvana. I am over 60 years and just getting back into vinyl. Does the Thorens have to be tweaked and modified before I get a pleasant sound? I just want to be able to relax and enjoy the sound w/o having to tweak around. Considering that Thorens are so old, would it be hard to upgrade it if I have to with better cartridges, etc? I listen to jazz, new age and some rock