Is the CAT 320E suitable or is there another better Excavator? The 324E?
Yes its suitable for just about everything but the 349E would be the best all around if money is no object !!
Suitable for what? In my experience, CAT320 a a solid general purpose excavator. There are larger models, but 320 will fulfill just about any excavation task. It can also be outfitted with concrete breaker or concrete shears.