I've got a bighorn (basically) that I've modified quite a bit. We change it a lot so I really like the adjustability. We actually just buy the tubing and use NRS connectors now, so I don't know if it still counts as a bighorn. I did have a problem with the footbar that came with the bighorn. I now use a "u" type that fits onto the straight crossbar. I currently have two dryboxes, and Engel cooler, and a DRE flip seat. Works like a champ, but we did spend a LOT of time experimenting with different setups. Not really sure why there would be a problem with a drybox other than the footbar that comes with them. If you are handy, you might want to piece one together yourself. You'll like it better in the end.
Also, I hated the low back seat. Upgrade to a highback or mesh flip seat and you will thank yourself later.