http://valinet6l6tq6d5yohaa6gdsf2ho4qcqcxyj2nahp5kd4z7nsa6ycdqd.onion/2015/09/22/ThinkPad-W540-review.html
I did that on Lenovo’s web site. A similarly specced T540p (except the video card, which is a GeForce GT 730M with 1 GB VRAM, instead of the Quadro K1100 with 2 GB VRAM in the W540) would cost me $ 1398.60, compared to $ 1412.10, so there’s a $ 13.5 difference which I believe is worth just the video card VRAM difference alone, let aside the fact that the W540 supports a maximum of 32 GB RAM (4 slots), while the T540p supports only a maximum of 16 GB (2 slots).