A7N8X and slow upgrading.

Alright, I thought this might possibly go any of the processor, memory, or MB forums, so I can repost there if need be, but I had a few questions that would sound strange if broken up.

I'm currently running an Athlon 1400 on an Abit K7G, with 2x256 Kingston PC2100.

I'd like to upgrade to an Athlon Barton 2800 on the Asus A7N8X with 2x512 Corsair Xtreme 2-2-2-5.

However, I need to do this upgrade as slowly as possible, so as to not upset the wifey =) This means... 1 part every few weeks.

Now, the first thing I need to buy is the Asus Mobo. Will my Athlon 1400 run on said Mobo? I realize this is the wrong forum, but would my memory AND processor run on said Mobo? I don't care how crappily they run, any upgrade should be faster than my current setup.

So, assuming they will work, should I upgrade the processor or the RAM next? I kinda feel as though the RAM should be upgraded next, as I'm not sure the Barton would play nicely with PC2100.

I also *do not* plan on overclocking, but I'm slightly confused - the Barton runs a 333Mhz FSB, correct? Every post I've read here and in the memory forum says that PC 2700 is fine unless you want to overclock, but since the Barton runs at 333Mhz. FSB, isn't it best to get PC3200 so that they run synchronously?

Thanks for your help... I'm not a n00b, but back in my day we basically only had Intel processors, and they only worked with one RAM speed =)

Thanks TKH - also, any idea on which I should upgrade first? Ram or CPU? I'll probably buy the MoBo on Monday. Ram / CPU may take 3 -6 weeks. I'm thinking the Ram would be the best, since the processor prices fall so fast, and I'm pretty sure that the PC2700 will be backwards compatible with my Athlon 1400 =)