I'd like to get my CC limits to where my monthly spending only reaches about 10% of utilization - so that would be somewhere in the range of $45k-50k, since my monthly spending is between $4k-5k.
I just broke $10K yesterday, so I'm good for now. I would like to all of my cards to be around $5K (and my cashRewards to jump above $10K) but I'm not jumping through any hoops to make it happen.
My goal was 3 prime cards with good limits. You can see where I am in my siggy. From this point on I'm just going for auto-CLI's. No need for more.
I'm working on getting all my major bank revolving cards (3 currently, 4 when I add BCE in a few months) up to at least 10K. That should give me some leeway to let balances report without affecting my scores too much (I usually spend around 3K-4K a month).