I have an old Hitachi 8" slider, and it is DEAD accurate even though it has seen a LOT of use and abuse (before I got it, on the abuse bit) I very much like Hitachi.
I think that 12" is a bit much as well, unless the guy REALLY needs it for something. The blades are a lot more money out of the gate, and the cost more to sharpen than a 10" as well.
The Hitachi 10" has a really good rep, it will be my next SCMS, if I can ever kill the 8" saw
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward