Nice kit! I have a 10/22 Takedown w/ Backpacker stock also, plain black.. threw in a Ruger BX trigger, some internal upgrades (extended magazine release, auto-bolt release, few other goodies I can't recall off-hand). I have a Bushnell TRS-25 on it currently but have been thinking of replacing it, but it works fine. Haven't really pushed the range.
That Cerakoting does sound expensive.. maybe rattlecan it?
Sweet build! I love that platform. I polished up the trigger myself for a much nicer pull, but my other mods have been minimal. I got a new charging handle and the Volquartsen bolt tune-up kit, but those few bucks was enough to tighten up a rough-and-ready little rifle into something a cleaner and more reliable. Now you've passed on the itch to me to get that Magpul backpacker stock I've always wanted, but never prioritized. The auto bolt release sounds like a nice upgrade too.
Another quick and easy modification for that rifle would be the firing pin/roll pin mod. Had an occasional FTFire on mine and this mod did the trick. %100 reliable now. I beleive its a 3/32" roll pin tapped down vertically to remove the sloppy factory free play on the firing pin.
Just make sure the firing pin moves freely with just a hair of play .