New setup with R7000 - advice needed

Hello, 

I am switching to a new ISP which gives me the possibility to use my own router, I have a Netgear R7000 and would like to use this for the following reasons:

1. VPN - I would like to configure my router to handle my VPN connection so certain devices always use a VPN connection and som never do. (If it is possible at all, I would only want the download application from my Synology to (using a specific port) to use the VPN while the rest of my NAS remains accessible at all times, VPN or not).

2. WOL script - I have a (big) TCPdump script to wake my Plex server when there is traffic on port 32400. It is a must for me to have this script running on the router. (see https://ibb.co/e2futV) 

(3. Link Aggregation - If possible, I would like to enable LACP for two ports so my NAS has a 2Gbps connection to my network)

My question: What router firmware is the best for my needs? DD-WRT? Merlin? (Advanced)Tomato? Other ideas?

Thanks in advance! 

Regards, Patrick