I had one of my best wreck dives on the "Eastcliff Hall", a freighter at the bottom of the St. Lawrence Seaway (Canada on one side, the US on the other). Current was strong, but once you got in the wreck it was awsome. This ship was carrying lead bars when it sunk and many bars remain. The top is all blown up, so you can swim in the hold of the ship from stern to stem. The top isn't completely gone, and you still have some stuff overhead. Once you get to the bow, there is a plaque in memory of the lost seamen. The current is still calm until you poke your head over the solid rail. The bow of the boat points directly upstream, so you can peek over and get your mask blown off if you aren't careful. Shimmy down the tip of the bow, letting the current hold you against the hull and down to the sand where the current is minimal. Let the current push you down the starboard (right) side and you will see a HUGE crack (where it hit the rocks) and you can actually swim inside (I didn't, but others in my dive did). The current takes you to the stern of the boat and almost whips you in behind the ship where there is no current. Ascend up the stern and do it all over again!
It may not be the blue warm carribbean, but this is GOOD diving!!!!