These three projectors don't have that problem. According to NEC, the ability to retain a sharp focus is a function of AccuBlend, not the DLP technology. Making Connections Setup is identical for all three projectors. Each offers the same set of connectors, adjustable legs, lens system, and menus. They also share essentially identical controls for their top panels and their remotes.
Basic setup is simple.
To control the mouse from the projector's remote, just plug an infrared receiver into your computer, which lets you use the pointer pad and mouse buttons on the remote as if it were a stand-alone infrared mouse. The infrared receiver comes with a 3-foot cable that plugs into the receiver on one side and a serial port on the other. The projectors offer only one computer input, which is all you should need for a portable projector. They also offer a stereo minijack to connect to your sound card, an RGB output for a monitor, and a stereo output for external audio using a minijack connector. There's only one speaker, however, so you're limited to monophonic sound unless you plug in external speakers.