While the weight and durability of iron sights are big plusses. Back in the day, my eyesight was much better, I only had one air rifle so I shot it enough to just "know" where to hold.
Now I have many rifles, I do not really know any of them well enough to just "know" where to hold.
Perhaps the best solution is to get rid all but one rifle. Yah, right that aint gonna happen......
Here is what I'm putting on my .25 marauder http://athlonoptics.com/product/talo...lr-ffp-ir-mil/
Still have to make or buy a rail to set the scope far enough forward to see through it while shooting slung up prone.