Best container to move prized records between homes? Thanks!

I've used Per Madsen racks for decades. Additional benefit is they can be moved without taking lps out and transferred to another container. Expensive but very satisfying.

Thank you everyone for your helpful thoughts, both past and if there are any in future.  All very much appreciated!  Enjoy your music!  

I ended up using U-Haul "book boxes." I packed all the LPs myself, adding a thin polystyrene foam board each end, and using lots and lots of strong packing tape. 

The LP's fit very snuggly, at a slight angle, so left a very small 'triangle' space at each end .  These end 'buffer' zones were filled with air bags/peanuts/foam bits. 

I also ensured my item specific insurance was up to date. 

Finally I personally oversaw the movers doing 90% of the moving, loading and unloading.  Toughest part was training them to very carefully but briefly use their dolly cart with boxes four (4) high, to move from the house to the truck.  The boxes were only placed two (2) high in the truck, with nothing else on top.  All of the boxes were very carefully handled from what I saw.

All the records arrived fine so thanks again guys!  Phew!

When I moved a year ago, I had to pack my 3000 records so they would survive two moves, first from our old house to a storage warehouse while our new house was being finished, and then 3 months later from the warehouse to the new house 160 mikes away.  I packed them myself using about 35 cardboard boxes purchased from the moving company.  These were labeled book storage boxes and were about the same size as the U-Haul boxes described by others.  Fortunately the moving company had a good number of used boxes they sold me for $1 each.  They had been used a few months earlier to store books when a library was being renovated.  Somewhat to my surprise, the boxes looked almost exactly the same when they were delivered after two moves and three months in storage.  And the records were exactly the same as when packed.  Maybe I was just lucky.

I did not trust the moving company with my equipment though.  I moved everything in a U-Haul truck to a rental storage unit where it stayed until the new house was ready.  That was a lot of work but it all worked out well.