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.
Scopes vary in power and objective diameter.
The power used should be between 20 - 25X. Diameters should be larger than 50mm, preferrably 60mm or larger. When buying a scope, you basically get what you pay for. A scope stand that allows you to adjust the scope so that it can be viewed in all positions is necessary. The standard for years has been the Freeland Bipod, now made by Champion Shooters' Supply. Other quality stands are also made by Mo's, and Les Baer.