Janusz Kesik wrote:
SZD-55, also back in production, but much more modern design than LS-4 (some
ten years younger)
Meaning what exactly in terms of L/D, ease of use, build quality etc.
Seriously, i have never seen a SZD-55 i have no a priori.
Lots of bang for a buck, isn't it? 
Depends on the answer to the above question. I know for sure the LS4
is an excellent glider. I know nothing about the polish one.
--
Michel TALON