To answer some of the questions....I plan to put a MDF top on it. I had to move a grinder on a pedestal to make room for the box and plan to put the grinder back on top.
As to the quality comparison with the HF44, I really haven't had a chance to really look over the build quality of the SO box. It is very smooth for a 10 year old box.
As to why I didn't just buy 2 more HF44's.......Despite the fact that I own 2 already, I hate buying anything made in China. I was working out of an old *** Craftsman box that was too small and needed to upgrade. I'm not a professional mechanic and a new truck box just wasn't in my budget. Despite Mickey O's claims, I couldn't find a decent deal on a truck box over a long time period. So I picked up a HF44.
This time around I wasn't quite as desperate and found this deal after about 6 months of looking. I like the full width drawers and the fact that it's made in Canada.