Any reasons to avoid one? Yes, tons of them but You already made up your mind. You didn't like the unvarnished facts posted elsewhere on 2 forum threads you started. You "have nothing but contempt" to all who responded with facts that don't fit your own views.

You wrote elsewhere:
"If I’ve done my research right it appears that there are quite a few of these boats that have done transatlantics, transpacs, Chicago Macs, etc. Thanks to the lead on the Hunter Owners forum I found all but one had positive positions for this vessel. If these are to be believed, and there are race results to back this up, the Hunter 54 is indeed a blue-water capable vessel."

You keep asking, on at least 3 different forum threads now, so you must have reservations, but when presented the numerous problems known about the boat, you lash out.

The other forum threads have told you about design issues [rudder too far forward due to dinghy garage, making it hard to steer off the wind], build issues by guys who worked in the factory in FL, undersized equipment issues, deck flex issues, owners who had to reinforce the mast partners, hull blistering issues, cheap junk electricals, flimsy rudder posts, perko crap fittings, poorly installed and leaking ports, flimsy hatches, "MAJOR CONCERN to current owners!!!!- ALL DECK HARDWARE NEEDS TO BE INSPECTED. Much of the hardware is not fastened well. This should be of major concern to you!! " and "This model has a problem with the steering attach points. They rot out" and "she does flex and make more noise than any other boat I have owned and I find the boat hard to steer off the wind when powered up. Having lost a mast I am out of action for a while"

I'd tell you about the one that pulled out it's chainplates and dismasted going to Bermuda, but you don't want to hear it.

That's a lot of facts to ignore but Go spend your money on it, take your young family to sea in one...you'll see.