Wow... just... wow.
You were doing just fine with your seven points, then the fanboy RDF kicked in. The 2500+ post Firewire is missing from the new Macbooks thread(s) should be enough to dispel the "only Pros need Firewire" debate. If not, the upgrade to Firewire 800 on the mini and iMac should be. We don't know what the OP's friend's Firewire camcorder is used for. Suppose it is used for family videos, meaning no revenue is being generated. How is the OP supposed to look at him with a straight face and say "you need to buy a professional laptop for $1000 extra"? (I guess this impossible task is what the OP is asking for help with) If the friend needs coaxing to get a Mac laptop, we can safely assume he does not have a Mac desktop to carry his Firewire connection requirement. MBP sales are being cannibalized anyway... by Sony and Dell and... Apple might as well get a piece of that action.
To the OP: as others have said, that Sony has specs almost identical to the white Macbook. Bigger screen, but same resolution. Same speed FSB and type of RAM. It does have BluRay, ExpressCard (34mm like Apple uses) and a memory card reader but can't run OS X. The Macbook has Nvidia integrated graphics instead of Intel and can run iLife. I find iMovie infinitely better to use than Windows Movie Maker, but my wife's parents swear by WMM. Windows itself isn't horrible enough to spend an extra $1000, but iMovie is good enough to spend the extra $150 or so a memory upgrade to the white Macbook would cost. You would spend most of that back on anti-virus and a decent video editor to use with Windows.
Yeah, the White Macbook seems to be the best bang for the buck with the most hardware features. So that's my recommendation and I will move on. I have my own Macbook issues.