Having made the switch to Apple I decided that seeing as the MacBook Pro doesn't have 64 bit processors yet, the best deal was to upgrade a White MacBook:
2 x 1Gb Mushkin PC2-5300 DDR2 SODIMM APPLE 971504A
100Gb Seagate Momentus 7200.1 2.5" SATA HD ST910021AS
Been pretty pleased with it. Occasionally I get a failed reboot - two bleeps and three flash morse code from the sleep light. This means that one of the DIMMs is not always recognised immediately. As manufacturers refine the Apple DIMMs you shouldn't see this, but I probably had the first batch, and it only happened about 1 in 10 times, and you never have to reboot an Apple anyway.
The HD is great. Very slightly louder that the stock Seagate 5400.2 60Gb, but lower in pitch, like a fan. And practically NO VIBRATION - better than stock! Can't say I noticed a huge improvement in speed - my java compile cycle showed not much improvement, but I'm still at the front of the drive.
Oh, I had to return the first 7200.1 due to EXCESSIVE VIBRATION. http://www.ncix.com/ replaced it, taking only a couple of days, so no real problem.
And target disc mode rocks!
I bought the Apple Bluetooth keyboard and mouse. No problems there either - both work just as good as the wireless ones I use in my office.
I had a bit of trouble with iTunes sometimes locking up. Doing a ps I noticed some MS office test drive database process running. I killed it. iTunes worked much better! So I uninstalled the Office Test Drive using the included uninstaller.