6mm06 - I tested the 640 res Bolt unit. It's very good. I don't like anything less than 640 now and would sell guns or optics to have just one 640 res unit instead of the lower res stuff. I understand that's not for everybody. Not hating on the 384 res stuff as I have a Super Hogster. It goes on my 10/22 and it's a very effective and fun varmint eliminator.
The Bolt design pros are: familiar riflescope form factor, you likely have better scope rings/mounts than they send with the unit, the controls are intuitive, ample onboard video and still photos, all the usual color palettes, decent reticles, very good processors, and with the 640 unit you have extreme clarity.
The ultra clear for in-fog use also works very well.
Cons: price for the 640 unit.
I should mention that the Bolt has a circular monitor, so you aren't looking at a small rectangular screen in a round eye piece. You look into it just like a riflescope. That's part of the "pro" for the form factory.
Finally, iRayUSA has a great warranty if you ever need it. Their 5 year / 5 day warranty set the standard that the industry had to chase.
Sendit
eta: sell one of those other AR scopes and buy the 640 Bolt!