Bold does custom app development, and they develop their apps properly and logically. What this means is that there will be minimal interfence with other apps you may use in the future.
Gareth ... If you don't find what you need within the confines of the Shopify forums and related sites, I think it's fine to look outside at any other options that you can find. I do think that the better Shopify system integrators going to list their affiliation within the Shopify Experts, App Store, Forums, etc.