The Samsung becuase it is the only one with a DVI. If you can use an HDMI to DVI cable with your PC, then I would recommend the Mitsubishi. It has the best picture and is of the highest quality in terms of design and build. One suggestion is wait on the next generation of DLP Samsungs. If you are going to buy one, I would wait and get it with a Cable Card, Optical output for Sound, an integrated ATSC and NTSC Tuner and an RGB input. I am waiting patiently for the new line of LCOS from JVC. They are making a 56 inch that has Firewire Input/Outputs, and Integrated ATSC/NTSC Tuner, Cablecard, PC RGB inputs and a PCM Optical Output for Sound to a Recievor. I would look at this set before I would buy another DLP. They just don't look as good unless you buy the Mitsubishi which is the best DLP made. I highly recommend it but they are 30-40% more money.