What makes the TC 7610 more favorable over the TC 7620. I currently have the 7610 and it's amazing for gaming, TWC/Spectrum 60 down and 5 up. WOW internet is now in my area and offering speeds up to 1 gig. I'm going with the 500 down and 50 up package but I'm going to need a modem that can handle that speed. I like the 7610 and want to move up to the 7620 but there aren't any high speed modems in the "good" list. Can anyone help out? I'm also from the Midwest United States.