One very important thing that should be mentioned ---> TRUST!
Who do you really trust your VPN Provider or Tor?
Personally I place more trust in the VPN provider than Tor, so I'd rather have Tor going over the VPN, than a VPN going over Tor.
Worrying about the negativity through a VPN I consider minimal, as long as that VPN provider keeps no records or logs...
It's real simple, with Tor, you have no idea who is out there sitting on the servers and sniffing, with the VPN it's real simple the people you are paying...
Then again there are some VPN providers out there that don't look very trust worthy at all, but at least BolehVPN is, right guys? LOL...
CHEERS