Altecs are more relaxed then the laScalas will be in my experiance.
Tha said you need to consider rebuilding/restoring either. i did some Lascalas a few ywears ago and after a upgrade and restoration they were much better then original.
For the LaScaal's you're going to want to upgrade that old tweeter and crossover minimum. that will get you a good way to a much more balanced sound then factory.