For the leather i would say
Poorboys Leather Stuff ftw
for a wax i would stay away from otc stuff, but if you dont like buying online get the Meguirs NXT its better than the zymol. if i'm not mistaken i heard turtle wax makes the otc stuff for zymol. if you dont mind buying online then get a carnuba wax from detailed image, like the
Poorboys Nattys Red its a lot better than otc stuff and its not too expensive.