I currently own a RA G2 in 5.56 and did a build (rebuild?) on my Howa 1500. Of the two I think the Howa was a better rifle overall. The adjustable trigger was nice. The RA needs a trigger upgrade to be as good.
The stock on the RA is better than the Hogue flimsy plastic BS that came with the Howa. I would happily pick up another Howa if I caught a good deal on one to do another build based on it. I doubt that I would ever bother using the RA for a build, although I would purchase another one if the right deal came around.
I think Howa is offering the 22 ARC in its Superlight or Mini action. I would start there.