Love the look of your 22LR upper, mjkeat! No doubt that's the best way to go as it operates so much like a true AR since it has a genuine AR lower.
I also *HAD* to get a .22LR that looked and felt like an AR. Also always wanted an M4 but other barrel profiles make more sense for me in a true AR. And getting a pony and "M4" rollmark for $450, how else are you gonna do it!
No doubt a bit of a gamble going with Colt/Umarex over other options but it's worked out well.