Hi Steve,
I'm in the same boat as you.
Done my PPL and looking at doing the CPL. I've already got a Be76 ME rating so was thinking of doing the CPL hours in a twin.
At the end of the day it doesn't cost that much more. But what are the hours worth to a charter op? I don't know.
The only good point I can think of is to instruct ME you need a min of 50 hours ME, I think. But at this stage I'm not interested in instructing.
Bad points:
price(dual time)
if you get a engine failure, good luck
The above points only worry me because I have low time over all, 110 hours. The flying is pretty much the same as a single but if you lose an engine that's where it would get me mainly because the procedures are not practiced enough(if at all).
Send me a private message if you want to discuss it.