Like you said, Photoshop is likely not the problem, here. Even my Matrox Parhelia 128 AGP, which is ancient, now had a Gigacolor (10-bit per channel color) plugin for Photoshop. But then the Parhelia series couldn't do 10-bit over LCD's, IIRC. However, they could output 10-bit (*3=30-bit) all day on analog CRT's, which are easy to come by in 20"-21" fashion--all those old, heavy Sun, SGI, Hitachi displays with the 13W3 connectors you threw away, all with Trinitron CRT's if memory serves, are great candidates for 10-bit display. I'm currently putting a system back together with that Parhelia 128 AGP and a huge Sun monitor. I'll have to post back about the results.
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