Let me start by saying that I probably have too many folders. I'm not a collector but a user. I have a bunch of folders that I just do not want to part with even though they overlap others in the drawer and I could probably thin out and save some money instead of spreading hte wear over so many.
With that said, I have two plain Sebenzas that I carry regularly, a large and a small. I love the both. They are the (forgive me)
pinnacle of a user folder. Everything positive that has been said about Sebenzas and the Chris Reeve Company heretofore, I agree with. If I could have only one folder, it would be the large plain Sebenza.
Now with that said, let me say that I also have a BM750. Actually I have two. The first one I had I returned to the dealer imemdiately upon receipt as the knife was crap. Eventually, after being sour on BM for some time, I purchased another and it was fine. I paid like $90 for it and it was my beater
Cheapbenza. I used it for all of those things where there was an increased risk of boogering up the knife or having the knife turn up missing. When I found out that the BM750 was being discontinued, I grabbed another - just to have it. I purchased that one from a dealer (in person!) and got a decent one. Ineterestingly however, it has a Spyderco clip on it.

I have a beater BM750, a back-up for it and my Sebenzas. The Sebenzas is a better knife (perhaps almost 3X in siome catagories) but, the BM750 actually provides a more secure grip, IMO while Sebenza provides a more comfortable grip for long term use sessions. Bottom line,
if you get a good one, the BM 750 is decent value for the money but the Sebenza will always be your quest (appropriately) until you get one. Be guided accordingly.
BTW: I am a huge fan of the frame lock/integral lock. I find that they are strong, reliable and easiest to flush out/clean when the get messy; more so than any other type of folder, IMO.