Head-Fi is indeed the place to go, lots to browse through. There have been reports of some issues with some LD2+'s, and the manufacturer has changed the design.
It MAY have been the tubes amd not the amp, but the bottom line is the newest design uses a different tube set. The deal is a good one, though, so the new "++" version may be a great fit.
There are several solid state options as well as tubes. Again, search around on Head-Fi. You might get lost there, but there's a ton of good advice and experience.