At the moment I'm in the process to get a new card reader system from Lexar. It consists of a 4-bay device for USB-3 (HR-1) or Thunderbolt (H-R2). In each bay you can plug in one device (6 different readers, SSD or 2 USB-3 connectors). So, the system is growing and adaptable to your needs. If the software supports it (LR doesn't, Photomechanic, Aperture and Capture One do) you can download the content of 4 different cards parallel. It even supports Micro SSD cards.
The cool thing is, all inserts/modules can be bought separately and do work as standalone readers. The CFast reader already comes with thunderbolt or USB-3.
I would stay clear of any WiFi toys. Usually, the transfer is slow and costs battery-life., Also, while downloading the files, the camera is blocked to take new pictures. Buying a WiFi card costs more - if one part is broken, you can throw away both parts. Settimg it up, can be a PITA as a router is much stronger than a card and occassionally switching off the camera interrupts everything or gets files corrupted. WiFi in the field to control the camera via app - okay, works. Downloading 50 MB+ per file to the remote device (iPad, iPod, iPhone, Android stuff) depends of the memory size of that device.