OT: Recommendations for localization companies and tools

I have a client who has a small C++ app that uses standard Windows resources
(e.g. dialogs, stringtables) and has these separated into resource-only
DLL's. We need to translate these resources into several languages.
Furthermore, the client has a previous version of the app that was partially
translated. We need to identify the strings that have been changed/added
since the last version and only translate those.

Can anyone recommend a good company for this? Is Acclaro any good?

I don't believe money is an object, so I am leaning towards the full-service
company. However, another alternative is to just the text translated and
use various tools like LingoBit or RC Localize to manage this.

BTW, my experience with translators over the years has been tolerable but
not pleasant. The quality of the translations varied widely, and the
contact people are technically illiterate. For example, I haven't found any
that is capable of producing translated .rc files. Instead, the text needs
to be copied from the .rc file into a Word document/PDF file, and I get back
the same then I have to copy/paste the translated text into the .rc file.

Thanks,
David (MVP)