I would check out the different resorts and see what you like. We own three weeks at Pelican Resort, and our only issue has been the increase in maintenance fees. Some resorts have higher and some have lower fees. The maintenance fees are still lower than hotel rooms and anything but distressed last minute rentals.
Pelican is the largest resort on the island with 342 units, so you will find the best selection there. There are many weeks that don't even sell for $1, but most of those are studio 2's up on the hill, or during hurricane season. We originally purchased there, and after buying a second unit, visiting the island for several years, checking out other resorts, and watching sales, we purchase 3 additional units at Pelican for specific location and weeks, and got rid of our first two units.
I don't know if all St Maarten resorts or weeks of the year get a bonus week when banked, but all of our Pelican weeks do. We plan to keep our 3 weeks and visit every year.