Our company has expanded, and it's mostly a cost issue, a little customer service issue. We're leaning toward a combination of Max and Modo now though, even though the extra cost.
Thanks MaxF, it's good to hear that it works fine!
I don't think supporting two applications is going to help your customer service a great deal.
As for the cost, it is rarely measured in the cost of the software but the skill level of the staff and the training of staff. If the staff are experienced then they will work efficiently but introduce new software to the equation then costs (at least initially) will rise dramatically whilst efficiency normally takes a hit.