Also, a .520 diameter hooded rear apeture is preferred over the more standard .575. The smaller apeture provides less room for error in sight alignment. The width of the front sight is mostly a matter of personal preference. Most shooters use the narrow NM sight, but some prefer the wider standard blade. The Warner and Paramount sights are among the best.
Front sights are basically the shooter's choice.
The Middleton Tompkins and Tiger Sight are very popular. The best coats are the NRA-style of either heavy Cordura or leather make. Several companies manufacture good coats, including Creedmore Armory, Custom Leather, Inc., and Hawkeye. They are also often used to locate shot holes during the rapid fire stages. More importantly, when shooting long range, they allow you to judge the wind by watching the mirage.