I'm looking at a D44 also and running 39.5x13.50x20 Irok Radials. I'll let you know what the run down is on parts. I think i'm going coilovers in the front for now and then upgrade to coilovers in the rear down the road.
FYI if your planning on running that big of a tire on a 44 you'll need to run alloy shafts with a higher spline count or you will be blowing shafts up left and right. 37+ is Dana 60/ 1 ton territory