[Freeswitch-users] Lunchbox-type PC as small server?

Hello I'm looking for a small, lunchbox-like PC to build a small-form factor CRM server to sell to small companies. Ideally, it should have one PCI slot so that I can stick a voice card to connect to an analog phone line and run FreeSwitch as well. I like Asus' EeeBox (www.asus.com/products.aspx?l1=24&l2=165) but it doesn't have room for a PCI slot, and I'm concerned about its performance. I also like stuff from MiniITX (www.mini-itx.com) , but they're a bit pricey, and might also not be fast enough to act as a server. Are there brands/models you think I should look at? Thank you.