A slower meter will probably allow you to hit the ding more often, high forgiveness will mean you don't get punished so badly for a missed ding.
My advice would be go for forgiveness over slow meter, when you reach a higher tier you'll end up needing high loft clubs which will have a quick meter so best to get used to it early on.
There are clubs that offer both though, slow meter and high forgiveness. Take a look at the Ping Raptures, absolutely brilliant clubs until you start to need more stopping power on the greens. Only another 6 levels and you can get the top set, they'll keep you happy for a long time.