I've go to agree with the opinion about buying large objective scopes. I also recommend against 30mm tube scopes unless you need one with a boat load of elevation for long range shooting.
A scope with good optics and 40mm objective will still beat a cheap scope with a 50mm objective, and
Many of the lower priced scopes with 30mm tubes have 1 inch optics inside!
The truth about scopes for hunting at dawn or dusk is finding one that produces about f5 to match the maximum size of your eye's pupil. An example is a 40mm objective at magnification 8; any more magnification is wasting light transmission.
Target shooting is typically done in good lighting conditions that negate the meed for huge objectives because there is so much light available and your pupil is closed down too far to use the available light anyway - 40mm scopes will get the job done.
3-9X is okay for target shooting at 100 to 300 yards, depending on how tight you need to hold the reticle against the aiming point on target. What I mean is that smaller corrections can be made with larger magnification just because you can see the aiming point "better". It depends on the type of target shooting, but 9X won't cut it on a half minut rifle at 300 yards, and maybe not even at 100 yards.
Unfortunately for most of us, the first qulity scope costs the price of all the crappy copes that we bought first.
I looked around on Cabela's web site - I was going to recommend a Weaver Grand Slam, but I don't see ads for Weaver. The Nikon UCC is close to $275, a Burris will also cost a little more, and a 3-9X40 Leupold VX-II is $270. Too bad you are shopping with a gift certificate - when you want to buy a scope at a good price check out Bear Basin.