I have a sagem box from woolworths (£59.99 ) Never had a problem with it yet. And I'm only using a set top ariel.
I even take it to work so that i have a couple more channels to watch when i'm not busy.
At the same time I bought a bush (£49.99 ) box for the mother in law for christmas - it was really dire.
Neither have digital or even phono outputs - sorry