Possible CMS for new Lib. Site

I've been looking though many, many Content Management Systems and application frameworks for something that would be good for the library. The one I like the best is Drupal. It seems highly customizable and includes many of the things we need. One big down side is that it does not nativly support MS SQL. It does use a thin Database abstraction layer and includes drivers for MySQL, Postgresql and PEAR. I can eiter try to get the PEAR library connecting to MS SQL or write our own driver. The other big issue is it does not do as much with links as we'd like (I couldn't find any that do). But, I think module(s) can be written to support 'DB Links'.

Others I looked at:
Seagull
PHP.MVC
PHRAME
MAMBO
Typo3