Well WELCOME TO AUTOPIA!!!!!!!!
First off great job on the detail..... Love the Lex GS
Well for the leather conditioner, I actually use the same armor all stuff you have which for the price i find pretty good. If you want a really nice leather conditioner, I HIGHLY recommend Zaino "leather in a bottle"--- it really makes the interior smell like true leather as if it was re-upolstered and doesnt have a greasy feeling.
As for the other products you have, you are off to a good start, and you have seem to have done prior reading or at least have prior knowledge about the proper steps as you have displayed. The only Highly Highly recommended product that I will and as many members here will recommend is a Porter Cable Buffer. It will provide better results and in half the time and effort IMO.
Some brands you may want to look into are
Klasse, Zaino,
Menzerna, 1Z,
Pinnacle,
P21S, and most of the Meg's Pro Line products....Im sure i forgot some, but i know our fellow members will chime in any moment.
Good luck with your future details.
Chris