The advantage to an AO or EFR scope isn't really clarity of focus at close ranges. The ability to eliminate parallax at any range you'll conceivably shoot at is where those types of scopes are worth their weight in gold.
For the everyday shooter that isn't concerned with pin point accuracy, parallax isn't an issue. To a precision target shooter it's a huge deal.
I shoot some F-class rimfire matches where the 10 ring is actually a pin head sized dot. If I move my head and the cross hairs move off the dot (non AO scope), that's a problem since I can't tell where the rifle is actually aimed.
Here are a couple of recommended reading threads about parallax and AO/EFR scopes, the second one is particularly good at illustrating the effects of parallax.
http://www.rimfirecentral.com/forums/showthread.php?p=1951780
http://www.rimfirecentral.com/forums/showthread.php?t=364832
Incidentally, a non AO scope can be adjusted to be parallax free at one particular distance, but it's a PIA to do it repeatedly. I've done it as an experiment, and it really works.
Short version, unless you're really serious about accuracy (OCD in my case..lol) don't worry too much about AO or EFR. But.. do some more research before you make your decision. It's a nice feature, but can be an irritation under some conditions.
I have two decent 22 scopes, a Leupold and the Nikon Target, both have EFR. I seldom use that rifle in the field so it isn't an issue at all.