[argyllcms] Dispcal, esp. gamma, advice?

So, first -- I now have a SoLux task lamp with a ``5000 K'' bulb that actually measures to 4700 K (but only when I remove the diffuser...that reduces it to 4200 K).
And, I think it's what I needed. I calibrated / profiled the display to 4700 K, and I can hold a ColorChecker against the screen and see, to the limits of my eyes, the exact same thing on both (after I adjust the distance of the lamp so that the luminosity matches). And I was able to get a good match on screen with the wood art just by tweaking the color temperature and black point sliders in Camera Raw -- again, with the caveat that even minor shifts in light angle cause large shifts in the appearance of the wood.
Now, I'm wondering: just what parameters, exactly, should I use with dispcal, and why?
The color temperature would seem obvious, I think. I can move the lamp to match the brightness, so I'm guessing I should stick with the native brightness. 

But what about gamma?
If I'm trying to match real-world objects and prints side-by-side with the display...what gamma should I use?
And does it even make any difference with a color-aware application like Photoshop? Would that mean I should target the native gamma to avoid loss of resolution?
I've seen lots of opinions and recommendations everywhere, all over the map. ``1.8 for print; no, 1.8 is outdated -- use 2.2; etc.'' I'd appreciate some help getting un-confused.... 

Cheers,

b&

Other related posts: