Yeah I mean pretty much every aftermarket gauge brand has their own solution for dimming and stuff. The Speedhut gauges I would go with have an inverter kit which hooks up to a dedicated plug for the gauge dials backlight, and then you drill a hole in the dash and mount their little roller switch in the hole and so you spin it clockwise or counter to raise or lower the speedhut brightness. Speedhut also lights the needles but those are non adjustable. I would go with black gauges with white letters/notches and the letters/notches are backlit amber when on at night. I think that would be pretty cool. Plus amber is really easy on the eyes so iffen they ended up too bright, it barely matters.
Dan's pricing is more than fair. I'm not against his prices at all, and even the gauges are fairly priced. It just starts to add up all together, and will be a lot of work to get everything converted. Lots of rewiring and changing sending units and stuff, as well as programming the gauges to work for your application. It would absolutely be awesome though and is still an eventual plan of mine.
The one thing I'm up in the air about is how the factory dimmer works afterwards. The dimmer works off of resistance and works properly only when all the factory dash bulbs are in place. Of course, you aren't actually dimming anything once all the gauges are gone. But that roller still controls the courtesy lights, as in they turn on when you roll the roller all the way up. I guess I would keep the setup like stock where the headlight switch and dimmer are installed into the dash, the dimmer would no longer do anything but turn the courtesy's on and off, and then I would just install the speedhut dimmer knob right next to the other two. Not too bad.