What do the competitive shooters use? After all, they tend to run 10,000 to 20,000 rounds a year. From the 2009 IDPA Nationals, 136 ran Glocks, and about 90 some 1911's (various makes), 35 or so S&W revolvers, couple of HK's, Sigs, CZs and Berettas.
http://www.idpa.com/tj.asp?ID=252