bkrois,
Welcome to HEF! Nice to see you here.
cat320,
I think that question is too open ended. Mainly because the lot sizes have to considered for snow work, and for dirt work, again the size & scope of the job has to be considered. When you're moving tons of dirt into tri-axles, you want a 4-5 yarder. If you're a landscaper like me, most jobs I do I use a TLB, or a skidder or a smaller TLB, so much smaller buckets. For overall use I'd agree with bkrois's comments.