I have use your ipv6 network, that's good. but I have not fixed ipv4 address.
I very hope get ipv4 fixed ip address. Do you offer it ? ;)
I'm not HE, but I suspect they offer it ONLY to their colocation customers.
maybe the IP Transit service offer ipv4 ip? If a cheaper price I am willing to try. :)
email sales@he.net for a quote or use their online quote request form http://he.net/cgi-bin/ip_transit_quote