Same here. I'm typing this on a macbook pro that I'm currently sucking data off onto my x220 running Arch. Similar setup. That msata bay rocks with an SSD in it, eh?
FWIW, specs say 8gb max but I've got 16gb ticking away in it nicely. You're probably aware of that but worth posting here for others if they are interested. One of the best laptop keyboards I've used.
I switched about 3 years back. I was using PB12 then and PowerPC was already on its way out. I figured that if I have to get new software anyway, I may switch the platforms as well.
The Thinkpad T400 I got is still a good machine, 3 years later. So good, that my brother bought himself Thinkpad X230 and is satisfied as well.
I hear it. I'm a stickler for comfort and design, so I'll be going for the thinnest, slabbiest, least-dent-prone thinkpad I can find when the time comes. I really do insist on the slab - i.e. as few indentations as possible - approach, so I hope its considered necessary, somewhere in the future, by Thinkpad designers ..
FWIW, specs say 8gb max but I've got 16gb ticking away in it nicely. You're probably aware of that but worth posting here for others if they are interested. One of the best laptop keyboards I've used.