I'll throw my voice in as well for the bev-seal lines. Its not that much more in the grand scheme of things, and while I never had a problem with the previous lines I was using, when I upgraded the piece of mind was worth it for me. Will also say definitely get the perlicks. The first kegerator I had used two of the standard cheap faucets, and since it was in the basement there would be a day or two between pulls. Granted I now know that there are some cleaning steps that can be taken with the cheap taps to get them to work a little better, but after breaking off countless black taps after they gummed up on me, Perlicks were an easy choice for round 2.
Otherwise, so long as you run a little cleaning solution and sanitizing solution through between kegs, and your beer/kegs aren't contaminated, you shouldn't have anything to worry about in the lines.