I'm looking into this box too. I'm considering the 56" bottom/top combo. You can this from
http://www.qualitytoolsforless.com for $1525.00. It's funny I've gone from the HF 42" set for about $650.00 to considering the HF 56" but it has no top box. Now here I an almost triple the price...I figure I'll never buy another box so WTF, right?
I'm in an argument with Sears right now, who sells this line as well. They advertise 30% off tool storage $100 & over. There is no exceptions listed and no where does it state "on select tool storage." If I'm successful in my arguments I can pick this up for about $1300 with tax. If not, I'm leaning toward the deal above.
I'm a total shade tree mechanic and have been stashing my tools on a 30" roll around I got for $50 and a craftsman top box I've had for 30 years and a couple of roll around cabs I got out a Lab remodel a few years ago. This is a real luxury for me but i'm justifying it to get the shed under control! It'll be nice to be able to spread things out and know exactly what there and whats missing and be able to lock it. I have a brother with sticky fingers!!