I love my mini. I am one of those guys who helped make a gunsmith rich by spending lots of money getting one accurized. I am very happy with the way it shoots. It is not accurate per se. I shoot it at my local CMP club once in a while and I don't get laughed at. I have lots of guns that are more accurate and cost a lot less.
In fact i will speak more generally. I love Ruger as a firearms company, especially post Bill, and i wasn't around for most of the Bill Ruger days so harbor no ill feelings, but Ruger guns aren't accurate. My MKII is the only one that approaches accurate and it isn't something I could really compete with. Even their bolt guns are not known to be accurate(bolt guns are where I go for accuracy and I don't own any rugers and have never really been close to buying one).
Hunting guns = ruger
Defensive guns ruger is competitive
Target guns, go somewhere else.
Of course, if accurate to you is hitting a milk jug at 100 yards off a bench or from prone, the Mini/Rugers will do the job.
Savage has a wicked good reputation and some nice looking product. I owned one. It was accurate.
I have been really impressed with my Marlin 891TS for the price, but it is not a 223. I would consider marlin if I was going to buy a bolt 223 b/c I am so happy with it though.
For semi-auto strictly looking at accuracy in 223 there is only one good answer. The beloved, super accurate, modular, improve as you go, AR-15. I am selling my "M4 derivative," but I admit it is accurate, especially for the price.
My Mini will be in the last 2-3 guns I would sell.