For new alignments at the club, we've been switching from Gargraves to Atlas -- primarily because of oxidation issues from the salt air. Rich Battista's flex track laying technique works very well for Atlas track, by the way.
For my use at home, I've decided to use ScaleTrax since most of my rolling stock is newer (no Postwar) or has been switched to scale wheels. ScaleTrax tie spacing and "spiking" more closely resembles concrete ties on a commuter line rather than wood on freight lines, but once you get the ballast and ground cover down it isn't as noticeable. It's easy to flex and the low profile looks great.
