Micro Seiki MA 505 vs Triplanar MK VII UII

I have both of these arms and was considering selling the Micro Seiki, I have read some good things about it. It just doesn't get that much play these days. I don't need to sell it but as I said it doesn't get much play and maybe someone else could enjoy it. I can't see putting a expensive cartridge on it to compare it to my triplanar/Sotto Voce cartridge setup just for the sake of knowing so any insight would be appreciated!!!