Rather than purchasing any bargain basement rifle, IMHO you are better to purchase a used quality rifle chambered for a cartridge that is appropriate to your purposes. Check the Tradex site at the top of the page and you will find used commercial Husqvarna rifles in good condition for about the same price as the low end stuff you are presently considering. I think you should consider the 6.5X55, .270, .308, or the .30/06. More power than the .30/06 is tough to manage, but less than the 6.5 doesn't have the level of performance you need for big game.
If you can't afford glass right off the hop, get an aperture receiver sight and a slightly higher front blade to match the height of the new sight. Get an inexpensive handloading set up, and this will allow you to shoot more for each dollar you have to spend on ammo. Good glass can be expensive, so don't rush into buying the cheapest scope you can find, you will be disappointed. The adjustments will not be repeatable and will not stand up to much use, and there will be problems associated with fogging and the ability to hold zero. When you can afford a good scope, be sure to get quality mounts. A good scope on a good rifle, mounted in junk rings will not work out well. An appropriate scope for a general purpose rifle is a low fixed power scope like a 4X or a 6X, or a low powered variable such as a 1.5-5X, a 2-7X, or a 2.5-8X. Don't fall into the trap of getting a big powered scope if you don't need one. The advantage of the scope over irons is that the scope reticle and the target are on the same focal plain thus are both in sharp focus, where as with irons, the rear sight, front sight, and target are all at different distances from the eye and only one can be in focus at any one time, once the sights are lined up on the target, bring your focus to the front sight and hold it there until after the shot.