I would like advice on how (as I know more than one method/way can be right) you all sight in. Right now, I have a three dot red do.

20, 30 and 40 I don't like them personally, much akin to getting a .22-250 rifle w/ only open sights, alot more potential there than you can get out of it w/ 3 dot red dots. Read all you can on Excal Vari-zone then beg, borrow, or steal one and check them out, lol