I have a customer who is using a combination of Miva(?) and Insynch. I think there's a lot (LOT) to be said for single sourcing this -- Website Pipeline is probably a good place to start.
For example - presently the customer is having problems when orders come in and the zip code entered on the order is incorrect or not in the Sage 100 Zip master file..... so my first thought is neither Miva or Insynch ever had to deal with this? They're both like ""deer in the headlights""....
+1 on going with a single source if at all possible...