
First of all, welcome to the discussions!
While your Mac will come with a ton of useful software preinstalled, a full version of Office is not one of them. There is a trial version, but it will need to be purchased to have the full version unlocked.
Apple doesn't allow us to speculate on their boards, but the MBs have been relatively recently updated, so now is a fine time to buy if the current configurations meet your needs.
Speaking of which, it is really hard to make a recommendation on RAM of HD space without knowing what you plan to do with your Mac. The extra RAM may benefit you, but it may also be a waste of cash.
I am a huge fan of the Mercury Elite Pro drives from OWC found
HERE. Whatever you decide to do, make sure the drive has the Oxford 911 chipset and avoid the cheaper and more common Prolific chipset. The Oxford chipset is much more stable and reliable in both Macs and PCs alike.
Personally, I like the BlackBook, but you do pay a $50 premium for the black. You can configure the white model the same way as the black and the difference is $50 - just for color. If you want to save a few bucks, take a look at the refurbished units from Apple. I bought a first gen BlackBook back in July and it arrived in perfect condition and has performed flawlessly each and every day since them.