Bartik is a very powerful thema. Its art lays in being or Simple or complex.

A nice 'bonus pack' could consist in setting a general image that fills in the full background.
the content regions can then be 'pasted' upon this image with transparent background/borders.

Fixed width woul be a good option as well.

Will this pack be published any time soon (as it dates from 01/2011) ?
Regards,
William.