If your priority is crystal clear audio, you're going to pick the Czech Dub that was made in 2011 for the BD.

I'm still unclear on where the non-SE version of the 1995 CZ dub would have come from - I don't think ESB and ROTJ were shown on TV here before 2002 when CT1 showed The SE Trilogy and TPM to tie in with the premiere of AOTC - I could be wrong though and I can't find the date of the Czech TV premiere anywhere.

Still, the translation of that dub is truly horrible, so I'd rather stick to the 1992 one.