Looking at a rifle to "see" if it is a shooter can't be done. Getting this Forum to tell you which length is or isn't accurate, can't be done as your results may vary. I have one of each (22" Sporter with 1 revolution in 12" rifling [1:12 twist] and 24" Bull barrel in 1:9 twist). When time permits, I am still trying combinations. The bull barrel was a tack driver until the circa 1969 Redfield Wideview scope failed. The point is, the rifle has to be shot to confirm the result.
I am fairly certain there are other length/twist combinations like:
22" Sporter in 1:9
24" Sporter in 1:9
24" Sporter in 1:12
22" Bull in 1:9
22" Bull in 1:12
24" Bull in 1:12
Twist rate to consider is for stabilization of shorter/lighter bullets (1:12) and longer/heavier bullets (1:9). Length of .223 barrel to consider provides ~30 fps velocity for each additional 1" of barrel length as has "generally" been reported. Your results may vary.
I figure you do not reload. Given that, you can't tell in advance of purchase whether a particular barrel, receiver, and ammo combination is going to be accurate, you have to trust that you can mix and match components to achieve the level of success for which you are comfortable. It will require work, time, a few extra $$'s, maybe some auspicious trading (of bullets or components), potentially some frustration, and eventually success.
You are going plinking anyway, buy the rifle that makes YOU feel the most confident (the one you like to look at, the feel of, and to carry) and then start the comparisons. Read the "Accurizing" Sticky at the top of this Forum. Keep records of the changes made, both subtle and large. You can purchase, trade, and switch barrels. The factory will switch a warranty barrel for you. You just have to invest yourself in the final determination.