curious to know opionions:

1) any recommendations on invisibile fences - brand / model?

2) are there any combo systems of E-trainer / collars and invisibile fence system...seems like the same collar should be able to be used for both?

I have never used and invisible fence, but I love the TriTronics ecollars.  I would guess they also make an invisible fence, but have never looked.  I got my TriTronics from Cabelas, but you can get them lots of places.