I only have 3 bucks and, in all honesty, can't say I'd replace any of them with anything else.
Buck 500 - This is one of my 2 main EDC knives (the other is a modified Opinel #9 drop point)
Buck 482 - This is the clipless version from Walmart this year. Perfect size and weight for backpacking. Probably the highest on the value range of any knife I own.
Buck 110 - Least used knife I own. I've acquired a few fixed blade hunters. Hard to say what the future holds for my 110. Everybody should own one but I carry mine rarely. If Buck sold a 110 drop point, I would consider replacing it. I find the clip point is a lousy EDC blade. Still my hunting knife, but...