Alright, lets talk axles. (newb ?'s)

Currently I have Creighton's old D44, and am slowly accumulating parts to put it together. I previously planned on throwing some gears and a locker in the D30, but with intentions of eventually going 35"s, I want the piece of mind of having a more than adequate axles.
So, should I build the the D30, or pick up an HP30? Is the HP30 worth upgrading to? Benefits? Or should I find another 44 for the front?

Keep in mind this is my daily driver, and will be for at least another three years.