Suther: Sorry, but Mossberg made a pistol that used the same mag as the 715T and fouled up the deal for us Canadians: it's 10 rounds now, the old 25-rounds are
verboten.
Satrap; the tall order is that you requested "Tacticool" + "Accurate" + "Cheap to buy" + "Cheap to shoot". It's understandable... but not really possible. The first two factors are not very compatible with the last two. Here's another possible suggestion, and again it will run you over that $400 you mentioned: a Ruger 10/22 tricked our with an Arkangel Nomad stock kit. Of course, the owner added a different flash hider, and this build begs for some kind of optics, so again it comes to how many $$$ the look is worth to you. I believe the kit is about $220, but don't quote me on that.
http://www.archangelmanufacturing.com/2012/09/17/archangel-nomad-2/
Little_Airwolf: Since you were too lazy to look up the information, here's what you asked for:
1. Magazines: The ISSC Mk22 rifle comes with one 22 rnds mag. They're US$30 at
http://www.cdnnsports.com/magazines/issc-mk22-22lr-22rd-black-factory-rifle-mag.html. That's just the first link I checked, I am certain you'll find higher prices, and perhaps lower ones too. Add the currency conversion, shipping and handling, etc. 10/22 mags? $23.99 at Cabelas's for the nice boring 10-shot rotary. BX-25 25-rounds for US$35. Or get a nice GSG 110-rounds for $119.99, but don't ask about the form factor or weight then.
Fact is, if you can't afford two spare mags, you can't afford the sights, bipod, adjustable cheek rest or other "cool" accessories (not to mention ammo, cleaning supplies and other consumables). Magazine price is mostly a non-issue unless you're planning to buy them in industrial quantities.
2. Speaking of weight: Mk22 weight without magazine: 6.5 lbs. Ruger 10/22: Depending on your configuration and options, anywhere from 4.30 to 7.50 lbs. Mossberg 715T flat top: 5.5 lbs. I used the manufacturer's sites for source.
3. Takedown? You really can't care about precision if you recommend a 10/22 takedown: search the reviews, they're not glowing at all. For that matter, all the 10/22 models are somewhat being painted as inaccurate and needing a barrel upgrade to be really precise. (Suther had a great post on this subject above).
4. Price? 10/22 basic minimum model is about $290. The 10/22 Takedown is about $450. Most buffed up 10/22 models are $650. The SR-22 is about $650 too. The Mossberg 715T flat top is only $270, but you'll be limited to the 10 rounds mags. ISSC Mk22 is $570. Al Flaherty's and Cabela's were my price sources. The point is: most "tacticool" weapons have a price point of about $650 and up. It's the price of the looks.
One last point: YOU did not provide a single "whole story" or data with any of your recommendations and you try to poke me about providing them? Like trolling much? Get off your little soap box, friend.