I wonder about Kali legality too. The ammo prices on the 7.62 have come back down on some brands, but for your first gun, a .22 would save you TONS on ammo cost. It might be a bit more Kali-friendly too.
Are the ruger 10-22's Kali-legal? You can get some nice parts for them, though i'd imagine the 50 round banana magazine wouldn't be Kali-kosher.