Welcome to the forum. Your question is a bit broad, kind of like asking what Mustang to buy, a six, GT, GT500, coupe, convertable, etc..
What model? (For instance, if you seek the best accuracy, buy a Gold Cup.) What chambering? (.45ACP is the most popular, but there are also other chamberings, such as .38 Super, 9mm, 40S&W and 10mm. All vary in dependability and accuracy.) What age? (Early Series 80 pistols are all steel, while later ones have some [gasp!] plastic parts.)