I will say that if you're looking for rested, long-range shooting (ie, 50 yards or greater) then you will probably be more successful with a scope. The finer cross hairs will obscure less of your target, giving you a more precise shooting experience.
However, most handgun shooting is done at less than 50 yards. Typically in the 30 feet to 25 yard category. If this is you (general range plinking at cans, etc.), then I will add another vote to the red dot hat. On my 22/45 Mark III Hunter, I was running an UltraDot 30mm with the 4MOA dot. It served me well until I migrated it over to my 10/22, where it continues to serve me well. A Burris FastFire III took its place and is also serving me very well. The UltraDot is a great optic for the money and will give you years of reliable service. Their prices are fair and the products are top-notch. A good friend of mine shoots with a Bushnell TRS-25 and I really like it a lot. Definitely one to consider if you're still shopping. It's less than $100 and well worth the money.
I've used a Millet SP2, Bushnell Trophy, TruGlo Open-Style Red Dot, UltraDot 30mm and the FastFire III. Of those, my favorites are the UltraDot and the FastFire III. I found the Bushnell Trophy wasn't bright enough. The Millet had some serious ghosting and flare (I had one red dot with about 4 or 5 red dot reflections off at the 10 o'clock position. The TruGlo wouldn't hold zero at all (kind of strange for an optic on a .22).
Take a look at the red dots. I think that will give you exactly what you're looking for.