I personally prefer the Mini-ITX and Micro-ATX Mother boards.  They can be fast and are quiet because they are fanless.

The latest version come with 2 cores and @ 2.5+ GHZ.. so Bryce and any other app would run without an issue.  I have built a few in the past for special projects for friends who needed something small.

Here is a sample photo of what the Motherboard looks like.

Here is the link to a site that sells the boards and dedicate projects.
www.mini-itx.com/
Check out all the projects on the right side of the front page.. my Fav. is the Mini-Falcon from
Star-Wars.
www.mini-itx.com/projects/minifalcon/