Goto MAKRO / or HYPER STAR all brands & models are at display, take along a action movie clip [i'd say gone in 60 seconds last 15 minutes when GT was taken and chase takes place, it is HD movie download from Torrent] over the USB and check the quality over your choice of brand, stay at 5 feet distance from a 40" screen, watch that chase clip it shall be flicker / jerk free (refresh rate) and built-in stereo surround sound without amp connected.
Thats how I choose Orient 42" for an outdoor installation in Jan 2014 for someone else.