Best VPN Solution

I am about to implement a VPN solution for my company and I do not want to make mistake on this. I want someone to advise me on whether to use the Software VPN solution or the Hardware type?

Also, I am trying to connect 6 remote location to the Head office via this VPN. these remote location will have a maximum of 5 users while the Head office have 65 users. What bandwidth size would be advisable.