Irfanview alone is enough of a reason for me to stay away. That program is such an incredibly essential tool in my "photo toolbox" that that alone keeps me on the Windows platform. If I wanted something different that had limited software options, I'd run FreeBSD.

Believe me, I'm no fan of Microsoft (their problems keep me employed!), but if you get right down to it, Apple is certainly a more "evil" company (in terms of being anti-consumer/press/other companies) and I've heard plenty of people who find as many or more crashes and headaches in the Mac world (and it's much harder to find support.)
I don't know . . . . If Irfanview really cared about their customers (are people who use freeware customers?), they'd introduce a Mac-friendly version.

Sounds pretty anti-consumer to me.
FWIW, I can't disagree that Apple has done a masterful job of locking people into its ecosystem, and as a consumer I don't always like that (but hey, you can make your iTunes library drm-free now!). However, I'm not going to base my buying decisions on a hair-splitting argument that Apple might be marginally more anti-consumer than Microsoft at the moment. Let's face it, neither of them is in it for us, but I need a computer, and Mac suits my needs better.
I still don't think a laptop is a good choice for a primary photography PC, external monitor or not... hard drives being a big reason why; laptops are stuck with smaller, slower, and less reliable drives. You're also generally stuck with slower processors.
I won't try to argue technical specifications with you, as I am out of my depth there. But I do think that is changing. The differences between laptops and desktops are much less significant than they were even a few years ago.
Wen-tom, you are brave. As someone who's had all the MCSE training, probably at least twice (just never got around to taking the actual course - long story)... if my wife came home with a Mac... she's be looking for a new husband.
Watch out Groucho, you just might get hooked. My husband is an IT guy too, although unlike you, he'd been thinking that a Mac would be a good option for
me for quite awhile, but not for
him, of course. We just never wanted to spend the extra $$ for one, as he builds our pc's, and that made the cost differential even greater. But last summer he won a Macbook Air at work which he gave to me, and I loved it. But I needed a bigger hard drive and faster processor, so I bit the bullet and bought a Macbook Pro. We were going to sell the Air on eBay, but the funny thing is, I can't seem to tear it away from dh long enough to list it.