I am on the hunt for watch # 4. The Timewalker grabs me. Clearly the 7753 has improvements and has evolved but is there a difference that I would notice with this on the wrist? They look to be over $100 more. I can scrap the extra cash if the 7753 Noob will look, feel and function better. I have read all the threads and it seems like some of you out there have traded up from the 7750 to the 7753. Any thoughts?