I don't see the advantage of the SSL on a portal unless you are selling a product or service. As far as dedicated IP's, I have several sites on them and recently added a non-gambling site to have a dedicated IP, the main reason for it was the IP it was on was shared with a porn site and some other dodgy looking sites.
That rate is terribly high, I only pay $2/month for each one and at renewal time I pay a year in advance so $24 per IP is worth it to me.
As for ranking I don't know if it helps or not but I added one site to a dedicated IP a few years ago as a test and it does carry more weight than the other sites on shared IP's. Might be a coincidence though.
One interesting point though is when you look at whois at one of the sites on a dedicated IP, it lists it as being on a dedicated server. That could be the difference.
--
"People who are unable to motivate themselves must be content with mediocrity." ~Andrew Carnegie~