Which bed base / frame to buy

I have bought a good quality Hypnos pocket sprung kingsize mattress (medium support), and now need to buy a suitable bed base / frame for it.
I would like a base/ frame with 2 storage drawers and a headboard, for no more than £500. Can you please advise me whether a slatted / solid bed frame or a solid/sprung divan base would be most comfortable and suitable for this type of mattress. It's all rather confusing!