I do not own a Target Mini, but I would say that they are a little higher in quality than the base model AR-15 fixed stock model (Olymic Arms Del-Ton, CMMG level). It is probibly slightly lower but close to DPMS, Remington, Bushmaster (Next line up).
RRA tend to eek out a bit more accuracy for the money.
If you want trully accurate (without customizing), I would go for a RRA model with the 2 Stage Match Trigger. The RRA National Match is what the Air Force Rifle Team uses (I think that all the military rifle teams use it, but don't quote me on anything other than the Air Force).
The RRA National Match, Varmint Rifle A4, and Predator Pursuit Rifle all have a 1 in 8 twist, which means you will need to use some fairly heavy bullets, and might want to reload to get a better selection.
The RRA Coyote Rifle has a 1 in 9 twist, so you will be well off with the bullets in the mid 60 grain range.
I understand a really nice custom combo is a RRA lower, with one of a few different custom triggers, a White Oak Upper, and a MagPul PRS buttstock.
Charlie