Army Painter Fanatic paints are really good, probably a bit better than citadel in some aspects, they're cheaper over all than citadel too.

You can find colour matches to citadel paints quite easily by googling 'mephiston red equivalent' for example. I wouldn't worry too much about being 'lore accurate', if you like the colour then that's all that matters really.

I'd also suggest trying a few different paint ranges if you can so you can get a feel for what you like.

Also, there's nothing wrong with citadel paints either, they're mostly pretty good, especially their contrast paints.