Interestingly, I also have a 10/22 TD and am also looking for a decent scope for around that price; also for squirrel hunting :-) The super sniper scope I took off my 308 was way too far magnification; great on paper but useless amongst the trees.
I've been doing quite a bit of research this last week and thought I'd pass some of that along; so far I've been having trouble seeing consistantly good reviews for any scope under $100 but juuuust over $100 there appears a few contenders; I've nailed it down to either the Burris Fullfield II 2-7x 35mm, which can be had for around $139 but gets stellar reviews;
http://www.botachtactical.com/bufuii2xri.html
...or the Redfield Revenge 2-7x 34mm, which is also $139 but for which there is a current $30 rebate offer;
http://www.opticsplanet.com/redfield-re ... scope.html
It seems like these are great scopes and quite a bit better than the sub-$100 scopes I had found; take a look and see what you think. And if you see a scope that gets good reviews at a better price let me know also so I can consider it for my TD !!
The Mueller APV seems well recommended but for me is a little too large for what I want on my 10/22;
http://www.amazon.com/Mueller-APV-4-5-1 ... B000SULCTA
I am planning to use Warne QD low mount scope rings so I can remove the scope when I break the rifle down.
By the way - what kind of groups do you see with your TD ? With Rem HP golden bullets, mine groups the first 3-5 rounds very nicely then starts opening up presumably due to barrel heating to like a couple of inches at 50 yards. After waiting 20-30mins it will group tightly again. I've tightened the locking collar as per the user guide, and played around with it some but still see the same gradual spreading.
Hope that helps, or at least is a useful sharing of research...