I think you said earlier you want a keg for the taste of tapped beer, but if you are worried about cost...check out the prices before you jump to a lower volume canister. A lot of times 1/4 is way less value than the 1/2 where I buy them. I think I pay only 20 bucks less for half of the beer ($100 vs $80) at the place I buy them. I just pay the extra $20 and walk around drunk every day :awe:.
We have people over so I can usually kick 1/2 in 6 months, but lately that hasn't been happening (ahh parenthood has changed our lives haha). But I'm not wasting too much either, so I'll stick with the halves for now.
Either way, it's still better than dealing with empties, and it tastes better.