Flobalob,
I thought you will go for reflex sight. The question is whether the mount, even quick-detach one, will maintain zero after removal and mounting again. I know sniper rifles have mounts like this but is this one as good? All I am trying to say is: is the thing you are trying to achieve achievable? Like I said I dont have experience with this mount. But I thing you are able to draw the conclusions what is right for you.
Re the price: if the rifle is any cheaper it has to be second hand. A cheaper new one I would be afraid to shoot it. Just for your info, if you can get a special permit for full auto weapons here, not easy but possible, the rifle would be about 130 CAD

The semi auto rifle costs slightly more then nice shoes for your smart suit... I dont know if it is a lot of money, if you are not illiterate with a lousy job or without one you should be able to buy the rifle. For comparison Glock 17/19 or CZ 75 costs something like 890 CAD here.
Re wooden furniture: there is beech furniture. It has been put on the rifles in the beginning. The resin/wooden chip stuff is ugly, I know. It is possible to buy the wooden furniture here, but it is usually older stuff removed from old rifles in repair facilities. It is hard to find a matching set. The particullar pieces have a slightly different color. but you can remove the old resin paint and apply linseed oil or bee wax and the color should be the same. Check pictures posted by Deckard (where does he get them I dont know, maybe espionage

), you can find it in those pics.
Finaly dont let me discourage you, I am just trying to present a different train of thought. I know it helps ME when I need to make a decission like this and usually I make my oposition myself.
I hope you will like the rifle. Let me know about the result, please.