Been to Maldives 3 times, did my first ever dive there on first trip (my honeymoon) but wasn't a dive trip other than that. Last couple of times did a lot more diving.
I have stayed at resorts in South Ari atoll and North Male. Preferred South Ari diving but possibly not a fair comparison as 1, went there at best time of year, 2 the DC never went to the same spot twice in a week so could have mostly been luck.
Anyway, on a business trip I assume you would be based in Male. Other than LOBs I doubt there are many trips going from there but more from the resorts. For a couple of days Ari is more difficult to get to (as are other atolls other than North/South Male) and involve either a long boat transfer or a plane (which is in itself pretty cool) and they will only transfer in daylight so may need another night in Male depending on timing. The DC that kept repeating dives was Paradise Island so I'd not both although for just a couple of days I guess they wouldn't repeat (also was "off season" so maybe they were worried about going too far although the sea wasn't rough in any way). Bandos is North Male and quite near Male itself so easy transfer, one of the only chambers in the Maldives is on the island (may be wrong but I think only one other than one miles away on the island which is ex-military base) and one of the longest established set ups, apparently allows 24 hour diving if you really want to go at 2am on their very good house reef. Assuming I'm right on location for your trip I'd give them a go.
South Ari I stayed at Sun Island, bit big for a Maldives Island, needed to rent a bike to get around, but diving was good as was DC, if you have the cash and want to go that area though I'd go to the Hilton nearby. Very exp but very nice and has one of the worlds best manta cleaning stations pretty much as its house reef.