SoCalGeek
Don't forget these things also:
1. If you really want a takedown .22 like the AR7, marlin also has a semi-auto .22 with detachable mags, that takes down similarly. Go here then click on the 70PSS (the "Papoose") - it's a weather buster config too - stainless/synthetic. There are other takedown .22s, but don't know of any other semi-auto ones - the other takedowns are going to be levers or pumps.
http://www.marlinfirearms.com/firearms/selfLoading22wClipMag/index.htm
2. The Marlins should be available dang near anywhere, so I would encourage you to do as you plan - to shop around several places. BTW, if you like the model 60 Marlin (semi-auto, tube mag), click on the 60C model on their website - it's an all-camo one - kinda cool.
3. As for semi-auto vs. turnbolt action in a .22: Very important, this consideration, when it comes to shooting non-standard ammo. If and only if you're sure that you'll only want to shoot .22 long rifle ammo, then by all means get the semi that you had planned too. But if you might be using the rifle for stealthy applications (i.e. suburban applications), and will thus be using rounds like shorts, CB longs or Aguila Colibri, then you'll definitely want a turnbolt instead (or a levergun even better), because the semis won't feed the shorter rounds reliably, particularly the shorts and colibris, and particularly the colibris - no chance of feeding that one. But turnbolts and levers will. Pumps - some will, some won't, IIRC.
You can always get another .22 later (and another, and...), so you can get a turnbolt or lever now, and a semi later. Or, you can get a semi now and turnbolt later, if you don't think you'll be desiring the stealthy apps in the near future.
Few things in the world funner than a .22 rifle - what a hootenanny!