Does anyone have any experience with Del-Ton? I can't find anything bad about them on the internet. Should I be kicking my self for not picking one up?

No, they all make them to to be interchangeable. Milspec is what the military speced, nothing more. The military speced certain thing that may not be of value to a target gun. Other times, it is because the military is too cheap to put a $270 trigger in every M4/M16. The standard trigger works fine, but it is awful compare to a nice one. Some of the steps require special tools (magnetic partial inspection) and others are just labor. E.g.TheGearGuy wrote:Mil-Spec comes into play when you want to trick out your AR with a bunch of after market triggers, bolts, etc. that are just as likely to fail as the originals. (If not more.)
With that being said... I know for a fact that Del-Tons will accept an RRA trigger just fine.
$675 is a good price these days, considering they are $750 direct:
http://www.del-ton.com/DTI_16_Carbine_R ... th16-0.htm
During the 2009 "Great Gun Buy" they were running for $850 and up. So obviously the price is effected by supply and demand, and I'd go even further to say that the price has nothing to do with the level of quality of their rifles. You're not getting an upper tier AR, but they are a good buy in my opinion.