If you're looking for purchase advice, state your budget and requirements (e.g. size and performance).
Don't buy anything OTHER THAN IBM/Lenovo ThinkPad T, X, and W/P Series if you want the Real Business Experience™
>>Other business laptops are welcome in /tpg/ (Dell Latitude/Precision, HP EliteBook/ZBook).
Libreboot models:
>>T60, X60; X200, T400/500
Modern models:
>>X220/X230 - 12", 768p, cheap and light
>>T420/T430 - 14", 900p, widely available, socketed CPU, Ivy Bridge installable w/ Coreboot on T420; Old keyboard swap on *30 series
>>T/W52/30 - 15", 1080p, DTR, 32GB RAM on quadcore models, USB 3
>>T440p/540p; W540/1 - Last Thinkpads with socketed processors, easily replaceable trackpad (W541 doesn't need trackpad replacement)
>>P-Series - 15'' + 17'', 4K display, 64gb of RAM, Xeon CPU option. Expensive. Bad stock cooling reported by multiple owners.
Why ThinkPad?
>>Used machines are plentiful and cheap
>>Excellent keyboards - tactile feel and quiet
>>Great durability: magnesium rollcage for structural integrity, with high quality plastic body panels
>>Utilitarian design: e.g. indicator LEDs, 7 row keyboard layout on older models
>>Docking stations that easily turns your laptop into a desktop
>>Easy to repair (most models), upgrade & maintain thanks to readily available service manuals for every model, spare parts easy & cheap to obtain
>>The best TrackPoint, great for those who type a lot or hate swiping their fingers all over a touchpad
>>Excellent GNU/Linux & *BSD support
>>Hardware Maintenance Manuals (HMM's) and Windows drivers for legacy devices:
download.lenovo.com
>>Used laptop guides by xsauc:
dankpads.com
>>ThinkWiki - Info on ThinkPads & running GNU/Linux on them:
thinkwiki.org
>>ThinkPad service guides w/ tutorial videos:
lenovoservicetraining.com
>>EPP discount for new ThinkPads:
pastebin.com
>>BIOS logo booru:
biosimage.booru.org