The cooled server cabinet was discussed here before but I found my question is a little bit different.
We have a client with some servers running into incredible bad conditions. The servers are in the middle of the office and cooled by a regular fan. Finally the company agreed to host the servers in a proper environment. The problem is that they don't have a room for the servers, but one can be built. There are just three or four servers; there may be more in the future, but in the near future one cabinet will be more than enough.
What are the pros and cons of a cabinet versus a server room? A cooled cabinet would be much easier but I don't know if there are problems with it. In the case of building a server room, is a regular A/C sufficient for this?