It sounds like you're satisified with your results, which is great. I use Lexol Leather Cleaner for my seats and Lexol Leather Conditioner on my home furniture. I think they offer the best quality for the price.
But if you really want to fully maximize your results, I suggest the following:
Continue to use Lexol Cleaner on your leather, but replace the conditioner with a protectant. Lexol does not offer a leather protectant, so I recommend Leather Master Protection Cream.
For vinyl, Lexol's Vinylex is a two-in-one product that combines a cleaner with a protectant. Generally, you get better results with products dedicated for a single purpose. Not that combo products don't work well, they are a good convenience for most consumers who want to get things done quickly. But if you really want to maximize results, then separate solutions are more effective. Lexol does not offer separate products for vinyl. So I recommend Meguiar's Quick Interior Detailer Spray as the vinyl/plastic cleaner, and Aerospace 303 Protectant as the vinyl dressing.