Power is an issue. At http://reviews.cnet.com/5208-7591-0.html?forumID=26&threadID=33449&messageID=386069 they had a bigger system, but a 250 Watt supply is under a very high load and aging very quickly. You'll want to visit Tomshardware.com and figure out what Watts you need.
For me, that list would have me pick up a 450 Watt PSU. Cheap fix to avoid the power outage.
I plan on purchasing a Sapphire 9800 pro but i was wondering if it would run fine with my system: