Last year i fitted a GRS front mount and it does its job brilliantly. (99% of the time)
Normal driving the temp is about halfway, but on a hot track day (Roughly 30 degree C ambient temp) the needle creeps up and is close to the red within 10 minutes of hard use.
That is with a perfectly health water pump (10000 miles old), brand new Radtec radiator, and slimline Kenlowe fan mounted between cooler and rad. I also have a modified front bumper (See pic) to aid the cooling even more.
I was on the track at croft 2007 on the saturday, and was having to back off after 5 to 10 laps to cool the car... (Even with having the heaters on full whack all the time aswell )
It only happens with sustained hard use, so only really bothers me on hot trackdays as said...
Car is running 15psi boost BTW. Less boost may mean less heat?

Hope this helps!