Mirror or Redirect some new domains?

[eksites]

Hey everyone.. I'm looking for pros and cons of my options for the following problem.

I just took part in that offer over at domainsite to register up to 25 .info domains for free. We'll see if there's a catch, but at the moment everything looks like it's on the up and up.

I registered a bunch of blog related domains.. bigtitsblog.info , milfblog.info, gloryholeblog.info etc.

I'm planning on setting up (obviously) a blog on each for SEO bait, etc. I won't need full hosting for them, (yet. If any take off, I'll transfer them to fully hosted), and my host limits me to 15 domains, ... but unlimited mirror/redirect domains..

Now, they won't be spammy, I'll actually have entries, links, etc related to the domain names, but can anyone tell me whether it would be better to straight up redirect to a new url (www.mydomain.com/bigtitsblog from bigtitsblog.info), or do a mirror, so that when people go there the url in the top stays the same?

Thanks.