As from what I've heard, A levels are more preferable after IGCSE. But it depends on your school. For example mine just offers IBDP, hence I'll be forced to take it. But for you, if you have a choice, then I think you should go for A-level. Nonetheless, it doesn't really matter which one you choose. You can do either of them. The only thing that matters is that you have the satisfaction with the knowledge you gain, and the way you gain it.