If I were to make choice then I'll go for SW2013 but again I'll push for subscription upgrade. If you can't do that then I would suggest SW2012 Sp 5.0
Also the log file has your serial key, so kindly remove the log file or serial number from the log key.
Tough call. We are actually going to upgrade from 2010 to 2013 in the not-too-distant future, because we like the improvements, particularly the new Intersect tool. But I would be very hesitant to go with SP0. I would suggest reading the What's New for 2013 and reviewing the bugs fixed in SP1-3, but I don't think you have access to the bugs without a subscription.
Given your frustration level with SW when you left the forum, you should probably opt for the less buggy 2012.
Was happy with 2012 SP5 but decided to install 2013 SP0 when I got the disc. First 2012 version model I opened in 2013 failed to work correctly. I model cutting tools using helixes, sweeps, swept cuts, and design tables. I tried one reinstall (all installs are complete with previous version deleted completely). Again my models failed. Uninstalled 2013 and went back to 2012 SP5. Continues to be the best version for my type of work yet. And from what I've seen in the forums, I won't touch 2013 SP4 either. Good luck!!