My 53 and 9 are favorites of mine too. It seems we have some similar tastes in blades. looked up getting an sp-51 after i saw you raving about it months ago, not knowing it was discontinued. What else rounds out the top of your list?[/QUOTE
Well the Ontario SP-8 is a good hacker and whacker sharpened prybar, the SP-10 is a true good beater knife as a big hocking heavy blade but it also can do a lot and I use it when getting fatigued because it has a REAL Hilt and its SABER GROUND as well. SP-5 is a nice light weight FFG that starts at a 1/4 spine and does every thing a BK-9 can do. The SP Ontario Kukri Machete that, is an "American Type Kukri", does pretty goodly as well. But all the SPs I metioned have no pummeling pummel a.k.a. a Thumpin and Whumpin hilt as the BK-9 has. My only other ontario big chopper class that is as versatile as my BK-9 is my Ranger RD9 in 5160 and it maybe FFG but also has a pummeling pummel a.k.a. a Thumpin and Whumpin hilt but the RD9 has LONG been discontinued.
One other chopper I keep forgetting to mention is my BK-4. More multi-tool than the BK-9! But that is out of production as well...as is the BK-20 and BK-29...probably are better than the BK-9.
My medium go to chopper is my RD TANTO, if I break the tip I'll have the tip reground to a BK-2 type point, of which I'm thinking of getting an RD Tanto just for that a lone.
I consider the BK-2 my short go to chopper and jack of all trades blade. But we all know how fragile that skeletonized handle is when you keep doing your drop in liquid nitrogen and then bash it around tests on it every day!