Comparing the BK77 MSRP of $391 to the BK7 street price of about $50 is not a valid comparison. If you follow the link above to CrocBlades.com, you will see their price for the BK77 is $235.50, and as much as I like Busses, you will not find a new 7" blade Busse for $235.50.
S30V steel is not the toughest steel in existence, but from what I have read it is pretty good, and it has been used in some high quality knives (Simonich, Strider and others). How will the S30V toughness compare to the BK7's 0170-6C steel - only testing will tell for sure, although I would guess the BK77 is tougher than the BK7. S30V will certainly be more corrosion resistant than 0170-6C.
I'm looking forward to handling the new Extreme, especially to see how the new grips feel. The BK77 looks nice!
Gene
S30V steel is not the toughest steel in existence, but from what I have read it is pretty good, and it has been used in some high quality knives (Simonich, Strider and others). How will the S30V toughness compare to the BK7's 0170-6C steel - only testing will tell for sure, although I would guess the BK77 is tougher than the BK7. S30V will certainly be more corrosion resistant than 0170-6C.
I'm looking forward to handling the new Extreme, especially to see how the new grips feel. The BK77 looks nice!

Gene