^^
No thanks- I looked into a Jack Russell when I was looking for a smaller dog as a companion for my Golden (who is the least aggressive dog that ever lived)- a male terrier would not have been a good choice as they tend not to get along with other male dogs in the household- I would consider one as an 'only' dog though.
BTW- if you're really serious about a border collie, I hope you remember what your previous one was like- they (along with the very similar Australian shepherd, which I also considered for a while- depending on their markings, good ones are 20K for an solid-colored one to 35K for a desirable 'Blue Merle'- I would imagine border collies to be in the same range) are the about the most demanding dogs as far as owner attention goes- they need more than just a bit of play-time or a few minutes chasing your kids around- they need a 'job' and will go stir-crazy without a constant outlet for their energy (they're very prone to separation anxiety and destroying your house when you're away).
I know you had one before, but do you have the room for one now? It seems like you'd want to be in a rural area to give one a happy life.