Tonearm for Technics 1200GR

I’m looking for a medium mass arm to replace the stock arm. Whatever arm is suggested it should have an armboard that can be bought for it as well. I run a Soundsmith Carmen MkII. 

Id like to keep the new arm under $1500. 

I found a Jelco TK 850s, but it appears to be a high mass arm. I also found a Timestep T-609, but it appears to be a high mass arm as well.