I personaly shoot a Vital Bow Gear 3 pin sight, the angular sighting technology they use is pretty cool. Trophy ridge, cobra, spot hogg, extreme, they all make good quality sights. As far as a peep sight goes, the bigger they are the more light comes through for low light shooting. The smaller they are the easier it is to center the pin in the sight and potentialy more accurate. If you got with a bigger peep I suggest centering the sight ring of your sight in the peep and then putting the pin on the target, makes it easier than trying to center the pin in a large peep.