I've started out shooting the Pietta Target Model and I prefer the adjustable partridge style sights.
It does require me to use two hands to hold it as steady as I'd like to while shooting, but that has basically been my experience when shooting any revolver.
Some folks can obviously shoot them one handed if they're match shooters, but since I'm not shooting in any competitions, using 2 hands doesn't bother me.
BTW, for anyone interested the Pietta target model is currently on sale at Cabela's for $199 plus $5 shipping:
http://www.cabelas.com/cabelas/en/te...dexId=cat20817