Need Tonearm help for a Thorens TD124 Mark II


I've had a NOS Thorens TD124 Mark II for awhile now and it's still in the box but lately have considered taking it out and putting it into service. I have a couple of other turntables so is it even worth putting into service. If I do, I need some help in choosing a tonearm. I do have a NOS SME 2009 Series II Improved tonearm that has never been mounted. Should I go with something like that or a modern tonearm. I don't have a cartridge picked out yet but I do have a sealed Denon 103D and a NOS Shure V15 Type VxMR. I am inexperienced in setting this up but want some advice as to what other owners or people who heard a TD124 think, or what direction they would go in with what I'm working with. Thanks all for Your help!!!
michaela
Thanks all. Yes the turntable and tonearm really are NOS in the box, I actually have a NOS TD160 in the box too. I found them and accumulated them over the years trying to feed this audiophile addiction. I appreciate the comments. I did consider putting an SME V on the turntable, I had seen a few 124's with that arm. I did at one time buy a Pete Riggle 12 inch tonearm for it which he made for the table along with an armboard for it but I that's still in the box too. I had considered just selling everything and using whatever I got to buy a modern table, I just didn't know if I was missing out on anything with the 124, it's been well regarded for a long time. I do use a Music Hall mmf7 daily and recently purchased a Basis 2500 and an Eminent Techology 2.5 tonearm but I would have to drill into the Basis to mount it and haven't wanted to do that just yet. Any and all other thoughts are so much appreciated!
I had a TD124 with a Rega RB300 arm for 10+ years, I made the arm board out of plexiglass, it was amazing....
michaela, it's time for you to add another forum. Lenco Heaven. 

The website is all about idler drives. Lencos, Garrards, and Thorens.

For those of us who moved from belt drive to idler drive, there's no turning back.

Once signed in, you go to market place, from there you go to traders. Start reading.

A new oversized bearing is mandatory. Sien (moniker sph) is doing a production run right now. Just order it!!!!.

Once the Thorens is in a new, heavy plinth, motor dismantled, cleaned, greased, and reinstalled, new bearing etc. etc. you will wonder how anyone would buy anything else. It is that amazing.

Don't be afraid to get your hands dirty. Effort equals reward, and this will be rewarding.
Your 3009/II Improved is a low mass arm and will work best with the Shure V15 VxMR.

I used to mount my TD124/I with 3009/II non improved, and it sounded okay. Later I went through a series of arms and settled on a Schroeder clone.

The 124 comes alive with high mass plinth, preferably mounted on high mass platform. I find that ceramic ball based footers also work better than brass cone footers.
another option for not too much outlay in $ are the Jelco 750 Arms of various lengths. I use a 12incher on my Garrard and IOM its a better arm then the SME 3009 any series but that of course is my listening preference. I'm sure you could sell that SEM and with the funds buy all the toys for the Jelco and have money lefty over.