I still really like my Fortec II, I just realize that it is not the best blind scan reciever out there right now. I am sure Fortec will fix the blind scan bugs soon tho, as this is thier flagship reciever.
Can't say much about anything besides the 3500 since that's what I have... I love the 3500. It's a little pricy but not too bad. The sd card is nice since you can save your channels and flash files easily without having to actually connect the receiver to a computer or any of that... just save on the card like a floppy disk and off you go. There's lots of places online you can get a receiver. A good portion of those places are valid and legit (check out sponsers)