Now this system isn't perfect, it isn't for everyone... but try it out and see what you think.
A number of tournaments in Australia are starting to use a comp system.
http://communitycomp.org/
This system essentially uses a second points system (comp points) in addition to the normal army building points, to get an approximate 'power level' of a list.
So if you want a very light list, you could give yourself a limit of 5
CC points. A list that's getting towards very powerful tournament level would be 20 points.
The system itself allows for low
CC lists to play high
CC lists by adding an additional Comp Score to the Overall Score. A player wanting to do very well at a tournament needs to play with low
CC lists. You could factor this in to friendly games using a handicap based on the difference between your
CC score and your opponent's
CC score.
It does require a lot of planning ahead of time: and it does have a few issues where some things aren't costed correctly; but overall it can create a really enjoyable game where people are rewarded for not taking uber-powerful lists.