So my Jelco 370H has arrived. Unfortunately, it was poorly packed and a loose mounting bracket and counterweight inflicted some minor cosmetic damage, but nothing too bad.
It is a very stout arm. Far more stout than the pics would lead you to believe. It reminds me, visually, of the Ortofon TA-110. For what I paid ($175 + shipping) it appears to be quite an awesome buy. It'll take me a little while to get'er up and running but I'll post my thoughts once I do.