I'm bumping this thread back to the top for a big fat "mea culpa" on my part.
I am now the proud owner of a brand-new pair of BX-4 Pro Guides that I actually paid full retail for at Bass Pro (although I did use some gift cards to buy them.

) and I try to never pay full retail for anything.
Can't say enough good things about the image my 10x42 BX-4's produce. Sharp, sharp, sharp. I mean razor sharp and not Vortex razor sharp either.
I sure am glad someone on this thread earlier set me straight about the eyecup problems. I handled a couple pairs of newer Leupold binoculars that had the ridiculously large eyecups that look like they were designed for Andre the Giant, and pretty well swore off Leupold as a serious binocular after that. Boy was I wrong.
My new BX-4's have quickly become my go-to hunting and birding binocular. I'm pretty thrilled to find a set of open hinge 10x42's that are still compact and lightweight. Only issue I have with them is a focus wheel that is a bit chalky at times, kinda like the Swaro SLC focus wheel. But I'm going to reserve judgement on that and see if it smooths out over time. I already contacted Leupold about it and they said "no problem, we'll be happy to replace them" if the focus wheel doesn't eventually smooth out. The Leupold CS person even responded to my request on a Saturday.
Every time I try to get away from Japanese glass, I find myself coming back. My eyes love that stuff.
These BX-4's are basically a slightly better version of my tried-and-true Cabelas Outfitter HD's (also made in Japan). A little sharper toward the edges, a slightly better field of view, much better eyecups (some of the best I've used so far in fact), lighter, more compact, and better ergonomics due to the open hinge design. I do wish the BX-4's had the Outfitter HD's focus wheel however.
Compared to my Conquest HD's, the image quality is essentially identical, the BX-4's are 1/4 lb. lighter, smaller and handle better, the eyecups are better on the BX-4's, and to my eyes at least, they both have about the same apparent field of view.
I also forgot how handy the diopter adjustment is on some of the Leupold binoculars. The adjustment on these BX-4's couldn't be easier, and it locks in place and remains completely out of the way once it's set.