You can use dual channel memory, but it will not run in dual channel mode on a 754 system. That is highly reccomended ram... and looks like a good buy.
Also, you cannot get rid of your paging file in windows. (Ok you can, but there is no point to it.)
You also might want to look into a better CPU. My friend has a 3700+ in his 754 system and it runs very nice!! (It looks like 3400+ is the best you can find now... the 3700+ was a rare item.)