I think you need to do a little more research on what EPP stands for.
http://en.wikipedia.org/wiki/Enhanced_Performance_Profiles
EPP doesn't have anything to do with the RAM being used as video memory. EPP is a way for the RAM to be set to the correct speed and timings automatically as long as the motherboard also supports EPP profiles. It's just a scam to charge more money for RAM IMO. I always manually set the RAM speed/timings/voltage to the manufacturers specs in the BIOS, so I have no need for EPP RAM.
The OP asked for a quality 4GB set of RAM. RAM that runs fast at a low voltage is a very good indication of quality RAM.