First welcome aboard! Second, guns are personal things, so buy what you like. But, if it were me.....
I'd lose the .30 carbine and Ruger mini 14 and trade them in on a decent AR (which will run you about 7 or 8 bills if you shop around. I'd look at S@W, Del-Ton and Palmetto State Armory or DPMS, and I can make you a good deal on a DPMS Sportical), or a good AK, for about $100 less. You'll make money on the sale and can use it on much more commonly available mags and ammo. Plus, ANY AR will shoot circles around the Ruger (and I owned and liked one, but it was minute of pie plate at 75 yards, just bein' honest

), plus the AR mags are cheap and common, so are the parts. Ditto with the AK.
As to the .22, if you are hell bent on taciticool, S@W makes their M@P AR in .22 and its a nice gun. But personally, for a whole lot less money? I'd just stick with your Ruger 10/22 with some twenty round factory mags. I mean the plastic isn't going to make a .22 anything but a .22, unless you're Chuck Schumer or Dianne Feinstein.

They are common as dirt, AK reliable, mags are everywhere, and they are more accurate then you are out of the box. Mine's thirty years old and I can hit a golf ball at fifty yards, and I'm not that great a shot. They are just a sweet gun. Buy a new stock, have a smith mount a rail (probably around $50) and buy a red dot or a 4 power scope if you want, though the irons are fine until your eyes are getting old like mine are. Frankly, I think every American should be issued a 10/22 on their 10th birthday.

Anyway, if you're worried about the zombies, or just want to keep kids off your lawn, that's the route I'd take. YMMV.
FQ