Leading the trio is the top-end LX52. It's the first to feature Pioneer's Precision Quartz Lock System, which abbreviates to the tongue-swoggling PQLS. We're going to pronounce that 'puhklus'. It's designed to eliminate wobbly audio when connected to a puhklus AV receiver.
All three will support BD-Live, which will be fantastic if anyone ever thinks of anything interesting to do with it. The LX52 and 320 include internal storage for BD-Live content, but the 120 has a 2GB flash drive that you plug into the USB port.
The BDP-320 arrives this month for £400, with the BDP-120 following in July for £270 alongside the BDP-LX52 at £550.