Ok, for the 2 firsts rules and the third amended. Let's see for the fourth.
In order of like:
1) Christmas Battle. It's fun and creates a target time for people to work towards.
2) Charity Concert. Introduces some player interaction.
3) Epic Concert. Although not the roadie as the roadie is already powerful in giving you the extra dice.
4) Fans = Fame. Might make fame a little too easy to get but I'd need to play some more with the rule to see how it works.
So yeah 1 and 2 sound like great fun. 3 without the roadie would be good and 4 not so much unless it works with some more playing.