I'll tell you which is a bad track to use is, and that would be...the broken ones
There have been a few "dud" pieces of about everything along the way. But really you need to know what you want from your track. Conductivity, rustproof, roadbed, ties, flex, hidden center rail, rail shape (flanges), rail code(height).
Manual, electric or command turnouts,(now or later).
Room available, and can you even run on 0-27 ?, or 0-31 ?, or 0-42 etc etc.
Does 0-27 or non-scale bother you even a little? Yes? Get you best ocd rivet counting face on, count yourself some nail heads, and lay your own track.
Transition between types can be done. And more easily if you screw things down. Screws would allow flex track too.
K line super snap I think is made by RMT now. A very cool track that reminds me of Lionel Super O.
Lionel O is a more robust product than 0-27.
