i had a super cheap BSA red dot on my 10/22 for awhile.  Takes awhile to get sighted in but i liked it.  Forgot i left it on and the batt died on me.  In all honesty, i would stick with the iron sights.  They'll do fine as far out you can shoot with a .22.  I HAD to get an optic because my tapco stock wont allow use of the stock sights.