[phyrrus9]

Bottom line if you have the money go for 32 to give you plenty of room to play with. Also warning about current version of Visual basic, bad memory leak atm...

You missed the bigger point. The cost and size aren't really as important as the specs on the modules. Get something with at least 2 channels, pay attention to DRAM timings and NB:MC ratios. Don't just buy a random memory kit with a bigger size, it could actually slow your machine down. Get something that's right for your specific build. Do it right or don't do it at all.