I'll try 391 again. I'm beginning to like the idea from last week for all of us to get an entry for every week we've tried. Unfortunately, it would be a real pain to keep track of and search to make sure there are no doubles with all the extra entries.
The odds in winning are 1 in 10*9*8 = 1 in 720, which considering there are about 40 entries per week could still take a long time.