Actually Bluetooth has been more reliable than Wifi in getting sound on all channels. I'd say it's worth the extra $500, you get two extra rear channels, built

Actually Bluetooth has been more reliable than Wifi in getting sound on all channels. I'd say it's worth the extra $500, you get two extra rear channels, built-in room correction (finally) and a Night Mode made for late night movies or listening to music. And i think a discount should also be possible. But you can always check out Avforums for more in-depth information.