I dont normally shoot from a bench, and 99% of the time, shoot from field positions. My AK's with red dots mounted, shoot pretty much identically to my AR's with red dots, when shot the same way.
The AK's sights are far from "bad", and really no different than most factory iron sights you see today, and like most military rifles youve seen since the beginning. When properly zeroed, they will work fine.
This was shot at 200 yards using the (slightly canted) irons on my SAR1. Ammo was Wolf 154 gain SP's, which the SAR likes. The lower three round group was shot from a rest, to confirm zero, the upper group from a cross legged sitting position, and fired at a steady cadence. If you cant read the numbers on the rule, the "head" is 6"x 6".
As far as triggers go, most all of the AK's Ive shot, have had very nice triggers, even the ones with "slap". They were a bit painful, but still "nice". All were better than any of the standard" grade AR triggers Ive ever shot.
The only AK trigger I had an issue with, was the Tapco G2. I know a lot of people swear by them, but the one I tried, was crunchy, and would actually hang on take up, and if you didnt fire, the next time you touched it, it would go off with very little pressure, much like a "set trigger". I put the the US compliance parts back in and its back to right.
If you want a nice, tunable AK trigger, the Red Star Arms trigger is a good way to go. I replaced the crappy compliance trigger in my SAR, which had some bad slap, with a RSA, and never regretted it.
One other thing to consider.... the price of the dot vs the cost of the gun is meaningless. Its what you get with the comb that counts.