Do I need a VPN with port-forwarding if I want to download torrents fast?
VPN and fast don’t co-exist!!!
If you want fast downloads try newsgroups (usenet)!!!
In short yes.
Without going into much detail port forwarding allows you to connect to more peers.
You can download without it, but you will find more connections with an open port. You will also be able to seed better
Not really, it’s just better for sharing.
Not all VPNs support this to my understanding. Some will allow it through NAT-PMP.
Having port forwarding isn´t going to give you any more seeders, if a torrent isn´t being seed port forwarding will not fix it, I would say you don´t need it.
Any vpn is fine, don’t worry about port forwarding, it will make no difference in this case
this right here. 100% facts!!