Do not forget supportability (Score 1)

Meaning do not forget what happens once it goes into production. Are the people who can troublshoot, maintain or update your app and source code redily available? Personally, this narrows it down to codes and applications using standard app servers like Java and ASP. Being able to hire most any java web developer to maintain your code, for example, is a good thing. Coding it in a language like C++ that many people know, but few know well, would nto be my prime choice.

So I put to you to be part of your decision, think down the road a year or 2, when new features need to be rolled out or there are bugs and perhaps your contractors are gone and/or not available.