To start the T-36 Weaver scope are a Great value, and a top notch scope, with that said they are hard to beat. The problem with Weaver is that they have changed hands a few times through the years, and not all t36 scopes are created equal. The New T 36 scope are great, and Weaver is doing well with the warranty on all of the scope produced.
I have several T 36 scopes, and I have both the 1/8 dot, and without. I personally prefer the one without the dot, for 100-300 yard competition benchrest shooting. I place the cross hair at the top of the moth ball (12 o'clock hold.) and like for my group to print just below. I find that with the 1/8 dot there is some "wiggle room" where I might not be exactly on my point of aim, basically the dot gets in the way. Nothing wrong with a Weaver T36 many competitive benchrest shooters are using them.
I do like the dot when I am shooting 600, and 1000 yard benchrest, as it makes a great reference point on a steel plate when hitting, but when hitting clay birds it can cover them up. Also with the higher magnification it also magnifies everything in between the target, a lot of long range shooters prefer variable power scope where they can turn down the magnification. Another thing to consider with long range shooting and higher magnification scope you have a smaller field of view, and if you tyring to locate a shot spray, it can be difficult, where with a variable power scope, you can back the power off, increasing the field of view, and see shot sprays easier. Even with all of that said Richard Schatz (Top shooter in the 600 yard Benchrest ranks.) uses a old tried and true Weaver T 36.
As far as seeing the fine cross hairs I have no problems, but I also have 20/10 vision, and don't need glasses. There may be a remedy for the fine cross hairs. There is a product called "bulzeye pro" that is an optical booster, that screw into the back of most popular scopes. http://www.bulzeyepro.com/optical-boosters.php It takes a Weaver t 36 and boost the power to around 45 power, With that it ever so sightly increases the thickness of the cross hairs, because it is basically boosting what you see in the scope. The only downside to this product is it will shorten the eye relief portion of the scope, making you have to get closer to the scope to get a clear picture, and if you shoot free recoil you have to pay close attention to how you set up, or the rifle will come back and "scope you." (Hit you in recoil.)
Hopefully this helps you make a decision.