I saw that a dealer has a new White's MX5. I read about it on another forum and Googled Whites MX5 and got a link. On the dealer website the MSRP is $599.
The detector looks like the Coinmaster GT and comes with a 9" Spider coil but also uses the Eclipse series coils. It has Auto-Trac ground balance, tones and notch like the MX6. There are no knobs just button pads and the control head is weatherproof.
I couldn't find any details or anything else on White's product listings.