Get yoursenf an Antec case.
They look nice stay cool, nice build quality space for lots of fans, and the supplied fans are quiet.
probably not the cheapest out there, but looking at the rest of your spec everying else your getting is good. (bar maybee the IBM HDD)
350watt supply that is pretty good (might want something better for major overclocking)
Please remember that wattage is only one factor of a good
PSU.
We have seen 550watt units that are very cheap and very poor quality.
Ive also seen high quality 250watts power high end systems.
Got a guaranteed good supply get one based a a fortron scource unit such as a Sparkel brand 350 or 400 watt
(I use a 400 myself)