Yep very aware my friend. Luckily with SP1 it supports 4GB.
The 8GB came as totally free, and if I could have had 4GB for less with that configuration perhaps I would, but to quote the latest Hexus article...
Bottom line: it always makes sense to invest in high-quality RAM, and recent pricing is such that a 4GiB set shouldn't be overlooked. Also, don't discount 8GiB; memory is certainly cheap enough to warrant it.
If I decide or need to upgrade to 64bit Vista or anything else in the future it'll be easier than having to tinker about with the hardware; I don't plan on changing anything on the PC for a while, perhaps another GFX card to enable SLi or changing it completely in a few years.
Anyway cheers for bringing that up.