I'm not a lawyer or tax professional, but I've researched asset protection schemes and have come to learn that you would get killed taxwise if you formed a C corp and would equate to double taxation, from what I understand. C-corp advantages kick in when you have a high number of employees. S-corp or LLC is the way to go for you.
In my opinion, having a Revocable Living Trust (if you have assets over the 1 million dollar mark...anything under might not be worth it) hold title to your LLC would be the way to go...especially with investment real estate. The RLT gets your name off the deed.
Here are a couple of great message boards to ask questions on asset protection (first link) and tax questions (second link). You don't even need to register or give any info to post questions:
http://bbs.mrlandlord.com/assetprotection1/index.mgi2?30 http://bbs.mrlandlord.com/taxes/index.mgi?73