49C @ idle is pretty good IMO.
What temps are you getting under load?
If you get temps >90C, then go for a fan profile.
Personally, 50% is about the threshold without the rig sounding like an airplane.
Running a fan profile @ this speed shouldn't have any ill effects.
Try a couple of 120mm case fans on the front first. This would be more efficient.
I got about 63C under load but it was just Quake Live in my browser nothing intense. I don't know how to test for anything intense.