Hi jovi
As far as your capacitors go, this is a highly documented problem on the net. It caused severe problems for a few manufacturers, namely Abit, MSI, Epox, ECS and Gigabyte. I doubt that the heat has anything to do with your leaking caps, they were just purchased cheaply from Taiwan, as opposed to quality Japanese capacitors that DFI use. The problem, as far as I know has now been rectified, and your leaky caps would most likely have had Jackson or TAYAH printed on them.
Capacitors serve three functions:
1) Filter A.C. components that are generated by the onboard “bucking regulator”
2) Store D.C. energy very near the load (CPU & AGP) thereby “smoothing” the regulated voltage.
3) Dissipate heat that is generated by function 1& 2
As far as repairing the board yourself, if you have considerable soldering skills and are up to date on multilayer "through hole" soldering techniques, then go for it. Further, you need to be aware that changing capacitors can cause a few problems to occur if the total capacitance of the filter circuit is changed.
1) If total capacitance is too high, the turn-on surge current could be high enough to trigger the OCP (over-current protection)
in the ATX supply and on the on-board regulators themselves.
2) In this type of circuit, incorrect values can cause parasitic oscillation, which will cause over-current, overheating and premature cap failure.
Now, in answer to your caps question, now I'm not 100% sure but I believe the replacement capacitors you will need are 4700uF, 6.3V and high temperature is a must (105oC)...125 if you can find them. Imho I think you're better off looking for a replacement board than attempting to replace the caps yourself. If you do attempt, I wish you the best of luck. Also, check these guys out, they will probably be able to steer you in the right direction.
http://www.badcaps.net/forum/
