Favorite = Aimpoint PRO
However, I really like the 1x Vortex Spitfire.
The cheap Bushnell trs-25 really works well on my 10/22 Takedown.

If the aimpoint pro is too big go with the trijicon MRO or aimpoint T2

These are my front runners. T2 is the proven winner, my eye like the MRO a lot but I've heard they aren't as good as the T2. I'm a buy once cry once person most of the time

Just out of curiosity, what do they say about the mro that falls short of the t2?
I've never really used an aimpoint product.

So far it's all hearsay and opinions from a few I've talked to. Opinions so far

I didn't like my EOTech but I really enjoy my Vortex Prism 3x

Aimpoint T1/T2 2moa but Ill admit that the Trijicon MRO is growing on me as of late as well.

In my opinion I don't like it aesthetically, it looks like a periscope off of a submarine in the movie Steve Zissou's A Life Aquatic. It has a bit of a blue tint to the lens as well. Aside from those gripes it does have a better field of view and a very durable design and it costs hundreds less than the Aimpoint Micro line. Im torn, I've been a T1 user for years and I still rock them on most of my rifles but one of my 14.5's has an MRO and I am steadily growing towards preferring it as of late.

It's hard spending that kinda money and not being able to use one

SIG Romeo looks pretty good

I recently put a Romeo5 on my CX4 Storm and I like it for $200. Can't give any meaningful feedback on toughness or battery life as I've had it about two weeks. The dot is crisp and intensity levels work well from no light to bright light.
Not sure Id go to war with it but for a range toy and turtle blaster it works well.