All of the above mentioned saws are small for 24". Here is why and perhaps clarification as to why you feel the need for a 24" saw would be helpful. Any of these saws will turn a 24" bar but the problem arises when the bar is fully or mostly buried in the cut. If you were limbing and wanted a longer bar to save your back, any of the saws mentioned will do the job but unless you approach 5 hp or more, saws get sluggish when using an oversize bar too large for what the chainsaw was intended no matter what the advertising copy might say. Thicker trees call for longer bars and thus engine sizes move up. If you do not care how long it takes to go thru a round, then any of the saws would work but if you are looking for any kind of efficient production for such trees because you have many, you need larger saws than mentioned. Husky 372, Dolmar 7900, Sthil 441, ( or even a 362 CQ if you were just occasionally needing a 24" bar),Echo 600 series etc. Much depends on how you are going to use your saw and more importantly,how often the need for a longer bar presnts itself and of course your patience factor.