The Shuttle will replace my main desktop (I have a few machines). It is very rare that I play games, but I will eventually replace my aging Radeon AIW with a Radeon 9700 AIW.

I would rather have the two slots in the back since I plan on installing a floppy drive in the Shuttle. I may go for that adapter you have. It all depends on how cheaply I can pick up a Dlink 802.11a Cardbus card.