well no offense but i don't think I would pay 450 for a D8. hell you can usally get a M1 for that if ya look around.
Or a D100, there is one for sale now for 350 or something
And My thought's On DAT, If you on a limited Budget to start with, I would stay away from DAT, cause it will take some money to keep up, I know most folk's Don't see it as an expense, But a trip to pro digital every couple years should really be figured into the total cost's aswell.
I see it as you could buy a new Jb3 for what it would cost ya to realign the head's and a clean up every couple year's.
And You still have to deal with tape flip's .
That was my main reason of not going with DAT, Second was the damn transfers.
I just don't care for DAT at all, Just my personal preference
I would suggest looking into some sorta hard disc recorder , you can buy a referb Jb3 for just around $200 from creative. Compared to the price of a used DAT ya can buy 2 for that matter, and allways have a back up.
Good Luck with your ?'s
Nick