archimedes

I am looking to add a Caterpillar to my fleet. I would love an original concept but a CCU will do just fine. I would prefer an Andromeda to Caterpillar CCU, if possible. I am also looking to get an LTI Archimedes if available. Thanks!

I saw the Archimedes was available and was wondering if its worth it to switch my merlin out for it?