My 'nice' irons are a Rock River 'national match' detachable
carry handle w/ 1/4 MOA rear A2 sight. Any quality 1/4 min rear sight should work (dpms, or white oak for example)
I then replaced the fixed rear hood and leaf with a
White Oak leaf set (rsaa4) so that I can unscrew the hood and use the ghost ring. I like my rear peep sights, but I hate to give up the ghost ring to get it. Another option is a 'tac' hood from
Bob Jones. Bob has a number of nice rear peep options to check out. I've got one of those installed in a Troy flip rear for another setup.
My front is a lyman globe JPFS-ALS from
JP Rifles, and with the scores of inserts available for globe front sights, its a pleasure to use. Highly recommended, but I'm not sure if the riser would work on a rail-height front.