I now have the first two issues in the new Naxos set. For the First Symphony, I think I prefer La Vecchia's account over that of d'Avalos, but not by much at all.
As for the Second Symphony, IMHO nothing beats Bakels' account with the Malaysian Symphony on BIS for sheet commitment and passion.
For the completist, the La Vecchia discs have a few fillers that I haven't seen elsewhere.