I would avoide the cherry coke for now. Diet fizzys should have 1cal per 250ml drink. I've not really found any but coke zero is a good one. I then use flavourings to alter the taste. Lemon is nice as is vanilla.
Food sounds great, be careful with the SF jellies though. bare in mind one jelly makes 4 portions, the suggestion in the book is that we only have up to 3 portions a day. I tend to make a full jelly and eat a third at a time.