@Boostme 

The plug you have is an AV2 standard plug rated at 1000mbps, therefore it should be compatible with any of the 1000 or higher plugs as they use the AV2 standard also.

If you want faster wifi the TL-WPA8630P  should work fine, its a 1300mbps plug with 1350 wifi but will work with your setup

As said really anything 1000mbps or faster will work, your choice

I would recommend to not mix vendors however, stick with TP Link plugs

@Philbert Thanks for the response. I was hoping to find a separate add-on WPA plug but the only one available is the AV600 tl-wpa4220 which might reduce the performance off my existing kit. So in the end I've ordered a tl-wpa7510 starter kit and I'll just use the extender plug...