Advanced cooling methods would be my recommendation. They are rather
fun to set up and very, very efficient. You could probably keep your
old case and just upgrade certain portions of your PC. It would also
likely cost you the same amount to buy a new case as it would to add
additional cooling.
A couple of the cheaper fast options (remember I said cheaper not
necessarily inexpensive) I can think of are:
1 - 'Oil Cooling' (
http://tinyurl.com/dltzat) which is well cool
although a new case will probably be necessary unless you have one
that is sealed at the rims and upgrades will be a bit of a hassle.
2- Use a Peltier Cooler. 'This one by ChilTec'
(
http://tinyurl.com/3ba7uj) is rather inexpensive and gets the job
done. Benefits are cooling comparable to water coolers without the
hassel and simple install. Downside is increased electricity draw and
size.
3- Get fan controllers and or heat sensors for the front panel of your
PC to monitor and control the temperature as necessary. 'There is some
cool stuff by AeroCool here.' (
http://www.aerocool.us/peripheral.htm)
More expensive and hassle full methods are:
1- 'Water cooling'
(
http://www.crazypc.com/products/h2o-220-ultima-9372.html) although
some cheaper models can go for around $100, but this is not
necessarily good as the quality is usually not as high (do you want
water to leak on your PC?). The water could be replaced with mineral
oil which doesn't cost very much though.
2- Buy a new rig with plenty of space and a good fan system. Maybe
even add a couple extra like a HD fan. 'The Mozart by ThermalTake'
(
http://tinyurl.com/azdkz9) is pretty sweet.
3- Imagine it. Make your own crazy combo cooling rig involving some or
all methods mentioned.
Whatever your desire I think a new case can be avoided since it will
be more work to transfer everything and make sure it works. However,
if you would just like a new one then go for it. An individual or
partial case upgrade I think is best.