I currently have the ex470 & just order the ex485. Will I be happer with my new purchase, meaning was the purchase really worth it. I upgrader the ex470 to 2 GB ram & up the cpu as well but to me it still moves slow....trying to download something as simple as a photo remotely takes forever. Will I still have this problem with the new as well?

What makes one better than the other one?

There's no real, noticable difference except for the software. That software will be officially available from HP later this year for the 475, too. I don't understand why they came out with a new one. I beta tested the 485, too.

The slow speed for remote download probably has more to do with your connection's upload speed rather than the MSS. What is the maximum down and up speed from your ISP?