Malta diving?

Hi dear Wetpixel members!

I have some questions on diving at Malta in July.

1. What kind of suit would you prefer for dives to about 30meters. wetsuit at 5mm or 7mm with or without hood or drysuit?

2. Any special regulations/conditions to make attention at, if we are two underwater photographers who wants to go diving on our own, going by car from divespot to divespot?

3. Do you know any "Must see" spots above and under the surface?

4. Any recommendations on cheap and good divingcenters where we can rent tanks and lead and get airfills (Eventualyt near the town Sleima)!

Thank you very much in advance for your help and ther very best regards from Kim Meineche!