We've done timeshare trades to go to Hawaii but not DVC (another timeshare we own). The resorts were nice but normally not worth trading DVC for (except Hilton's); Marriott's in Hawaii do not trade through RCI. We have stayed at 3 of the resorts on the DVC RCI list: Hilton Grand Vacations at Hilton Hawaiian Village, Shell Kauai Coast at the Beachboy and Wyndham Waikiki Beachwalk. We'd stay at any of these again but the Hilton is probably the only one that would be an even trade for DVC (need to scope out a chair by the pool very early - they go fast).
If you haven't been to Hawaii before, you may want to do a split stay to a couple of islands. Each island has it's own merits. Maui is a good one to start with because it has a good mix of what Hawaii has to offer. Maui is tough for timeshare trades though so we rented condos there a couple of times - the prices have been quite reasonable. We had a nice 1 bedroom oceanfront just north of Lahaina for $150/night a couple of years ago; prices have gone up but, with the current economic climate especially in Hawaii, there are some very good deals. Renting is a lot more flexible as well.
We use frequent flyer miles and it's very difficult to find flight dates that coincide with a timeshare week when you're trading. Do a Google search on Hawaii condos, Maui condos, Kauai rentals - that sort of thing - there are a lot of them.