I just updated my site with SubtleTrooper (
www.toolboxcreations.com
), still some work to be done but so far I've found it very easy to work with and get results very quickly. Have a look on the RT demoserver for the different template configs, I'm sure it's possible to get a layout you'd be happy with - although I'm not 100% sure what you mean by "fluid".
Cheers
Dan