Both Stu and I have the Badger bedchair - One Each before any comments  -(Click Here) and for occasional use it is certainly good value.
I say occasional use because it is a little on the heavy side and I wouldn't want to be carrying it too often but for the odd weekend or week away I don't think you can fault it for the money.
As for comfort factor - I think we'd both give it 10/10
Bivvy wise mine's a Rod Hutchinson Geo 2.2 and again an excellent bivvy. Also check out the Shakespeare Cypry Excel