I LOVE Alpha H. I've used lots of their products and they are perfect for my combination, pigmented skin. Balancing cleanser is lovely and the Liquid Gold Night Repair Serum is excellent. Might be worth trying some stuff first or sticking to their non glycolic creams if you are particularly sensitive. I use some decleor & Emma hardie too but now largely Alpha H.
They have some excellent value kits on Salon skincare at the moment - I've bought a few- so you could try it that way?
I'm a skincare junkie but really have not seen anything make such a difference to my skin.