What burner is best for mass production???

[arpytan]

I use my Yamaha 6416 Burner for mass producing CD's for company giveaways. It has made about 1,600 CD's in a year. I'm expecting it to break down in a couple of months. Right now, I'm thinking of buying a Ricoh drive because it's cheaper. Can anyone suggest the most durable burner? This is my primary concern because like I said, the more CD's the burner produces before it breaks down, would be the best choice for me.