You can use any digital box which has RF or A/V out. A/V out would be preferred.
The DTA box (if they have them), will have RF out only, no guide, and only get basic channels.
The "advanced box" will have A/V out, guide, and be able to be subscribed to all SD channels.
By now, all analog channels will be simulcast in digital SD, so you don;t need to worry about them, unless you want to keep dual tuners on an S2DT.
Series 2 234 Hr Lifetime.
Window XP and Ubuntu Linux on my PCs.
Watching more and more in HD direct now.