Originally Posted by
WWads
In your situation, the Reserve is probably the best bet. There's no centurion lounge at ATL, and unless you frequently fly to airports that have one, the extra lounge benefits carried by the Platinum wouldn't mean a lot to you. If you are reliant on the MQD waiver and MQM booster to achieve status, that pretty much seals your choice. For the booster, it's 30K for 15K MQM with the Reserve vs 25K for 10K MQM.
However, The Club at ATL is a PP lounge.
IMO it would help to know more about the OP's travel patterns (all domestic?) and type of hotels used (FHR properties in the mix?). My instinct would be to agree with the advice to go with the Reserve card, but it's not clear.
Should we assume that both is not an option for the OP?