"worth" is relative to the person.
i know people that feel that anything over 200~300 for a 22LR is crazy. So you know where you stand already in their eyes.
Look at the trainer "specs" and then look at the lux "specs". See for yourself if the differences are "worth" it to you.
If all you want is someone to enable you, then consider yourself enable.
Also, if you want to the 455, then get the 455.
just consider that the 452s aren't being imported much anymore.