I've used Greg's gauges, by request, in one clients car and he loved them. I have also used custom Speedhut in other custom builds (Mullis' were speed hut that we modified further and Joel's 996/356C coupe will get Speedhut).
One really cool thing about the speed hut gauges that I loved was the programable fuel sending unit. Essentially drop in any sending unit you want and then program the gauge to match, set a low fuel light where you want it, etc... really handy.