My club also uses an SX 60. Profiling is essential of course.
Initially we used Faststone as our viewing software, using a dual screen, and this worked well. We had the control screen for the operator and kept the scores by simply moving each image into a subfolder by score ( 5, 5.5,6 etc.). This woked well for the simple club competitions, but doesn't cope with interclub properly.
After some investigation we went for Dicentra ( http://www.wilburimaging.com/wisoftware/DiCentra.htm#OrgComp
), which keeps score, generates reports etc.
At first we allowed users to sumbit either JPG or TIFF images, but hit a problem. We got TIFF files that either contained layer, or were 16 bit (or both) and the simpler software can't cope with these, so we have changed to just JPG - suggesting minimum compression - and we see no issues with this. We still have issues with members not being able to resize their images properly, sharpening , getting their borders right etc. Photoshop is a real challenge to some. Gone are the days when they could just shoot slides, get someone else to process them and just submit them for competition - usually without masking them, straightening the horizon , or I swear, sometimes even looking at them.
There are problems however.
Digital projection is not perfect, and unlike with slides , few members have their own projector so they can't see what their image will look llike on the screen.
Blown highlights are a problem. sometimes shadow detail gets lost. The viewing conditions cannot be predicted - some venues can't get a good blackout - emergency exit sign light are our main problem.