I've dived Tufi. It's a mix of outer reef dives, and some easy muck diving (and a wreck!) in the inlet where the resort is. Mostly you go to the outer reef for 2 dives (different sites), then if you want to do a 3rd dive, you do it on the house reef in the afternoon. There's a wreck just off the house reef at about 47-48 meters, so they're not going to let you dive it unless you have some pretty significant experience. Worth a look though if you've done a bit of previous deep diving.
Pics from a trip over New Years 2014-15
Pics from a trip over New Years 2014-15