I tried like heck to get in when HGA first began. Not really to grade 'investment'-type cards like your OPC Jagr RC, but stuff like OPC Platinum parallels or Canvas YGs as nice, high-grade customs. After 12 weeks, I never got in and, in retrospect, thank goodness. It looks like they've cooled on handing out high grades and I don't know if it's marketing to make it look like they are tough, or if they are really tough. I've heard mixed reviews on their slabs both in quality and appearance. I don't feel like the value is there at the high end, either, but it's probably more that there still isn't enough data on most cards and the market has cooled considerable.
From ebay sales on the Jagr, HGA 8.5 is most common and they sell for ~$35, an HGA 9 is probably a $50-60 card right now. I couldn't find sales data on HGA 9.5 or HGA 10. An SGC 9.5 runs around $60-75 right now, SGC Gem 10s are $150, and SGC Pristine 10s are $500+. A PSA 9 is ~$70 and a PSA 10 is ~$325.
As you said, PSA, at current prices, isn't worth it. If you think it's a PSA 10, I'd either wait or go with SGC for short term.