I am a Mac user by choice and also a Thinkpad carrier. Let me start by saying both are solid machines. I travel with my Alu 15 when it's personal and my T30 when it's not. My TP history includes a 770, 600x, and now the T30. On the Apple side a TiBook 500MHz (1st gen) and now a Alu 15" 1.25GHz.

I seem to be destined to carry heavy kit with me.

Alas, for many years I carried both if the travel was for both. Over the last year or so, my employer has recognised that not all things are Microsoft and have begun accepting other platforms onto the network including VPN access and so I'm able to take just the PB on many non-customer facing trips (funny thing that, that they want their logo on the kit when presenting to clients).

I am beginning to consider getting a 'home server' in the form of a Power Mac to handle the heavy lifting I do on some of my personal projects (mainly involving audio restoration). Once that happens, I'll be in the market for a smaller travel machine and I'll probably request one of the lovely X-series to replace the T30 to boot.