What sort of setup do you want to have? How big is your database? What kind of marketing are you doing?
It is a good idea to find the agency that fits well with your intentions. If you email me directly, I can discuss your options.
We're looking for technical setup and Salesforce integration. We're a brand new company that isn't launching until mid next year so we have no database currently. We plan to use Marketo for transactional notifications throughout the buying process as well as for nurturing campaigns.
We already have SOW proposals and each offers the services we need, just looking for insight from others on what their experience was like working with each company.
You can try with Infosys.