Credit Card Recommendation with Rewards

Hi guys.
So I had to drop a couple of credit cards to get my refinance through.
Now that it's through, I want to replace one of my existing.

I had 22k limit across 4 cards but had to reduce to 4k across an amex and latitude 28 Deg.

I am looking to lose the latitude card as it has no reward benefits etc and replace with a MasterCard or visa.

I have home loans and offset accounts with Mac, CBA and st George.
Can anyone recommend one of the lower limit cards from these banks that come free with the offset accounts, and has some rewards.

I do not want a 15k limit as it will affect future borrowing.
Prefer 2k limit but looks like I have to settle for a 6k limit

Thanks