Eric, I have seen a few 13" Makita saw for sale in the past 3 years but the go really quickly, usually by the time I call they are already sold.
That being said, I have a shop with 5 employees, I have 16" Makitas, a 14" Protool, and 4 10" Saws- 2 newer makitas, 1 older Makita with after market base, and an old B&D.
I would have to say that in 8 years of timberframing, the 10" saws are the most used and most needed saws. In fact, our company had only 10" saws for 3 years and we do a lot of stuff with fairly big wood.

The newest Makita 10" saw is an awesome saw.

Colton Allen