Well I decided to email Whistler and let them know how happy I was with the Pro-73 and decided to ask if by chance they were working on any new models with better performance/filtering and this is the reply I got, looks good so far and now I'm interested to see whats coming from Whistler!
The email came from a manager there of the Customer Serivce/Tech Support department too 8)Thank you very much for your feedback! We are pleased that you are happy with your PRO-73!
We are concentrating on improving performance and reducing false alerts in our new models for 2007. Keep an eye on our website for updates, or email me directly after the 1st of the year.