Thanks VERY much for the heads up. I saw the 510 on my site and the 100 hour record time had me drooling, but your thread brought me back down to earth. One of the big reasons I went with Dish was because I got the PVR for only $50 and didn't have to pay a monthly fee unlike Tivo. It didn't have all the personalization features, but I don't care. The basics (being able to pause/rewind, etc) are what I love.
I'm probably going to go ahead and snatch up another 501/508 now before they're all gone. I've already got one 508 and love it. I want a second for my basement office/living room where I have an old big screen projector.
Have they officially announced the plan to charge for PVR service yet? I noticed most of the 508s on Ebay were going for virtually the same price as buying new and wondered if it's always been that way or if this info has leaked elsewhere raising prices on the older units.