I had the E7440 machine, very nice, powerful, fast laptop.
BUT I had physical keyboard problems from day 1 that never got resolved, despite replacement of literally every single piece of hardware. Including the whole laptop. Beware!
I bought a HP Z620 Mid-Tower Workstation, Dual Intel Xeon E5-2620v2 6-Core 2.1GHz, NVIDIA NVS300 1GB, 8GB DDR3, Dual 500GB (1TB Combined) SATA, Win7Pro and it only has a single Intel cpu. The product advertised lists DUAL Intel Xeon E5-2620v2 with memory upgradeable to 192 GB which is not possible with a single cpu and 8 memory slots. I wonder if this has been the case with the 2 other people that purchased this product. I expect to be shipped what I bought, have the missing parts shipped or a refund. Waiting for customer service reply.