Where to begin?

Hi all,
I am posting this because I am in the process of wrapping up CISSP studies and test in about a month.
After that I would like to get my feet wet with virtualization since it really interests me and I see it definitely continuing to grow. I have worked a little bit with Hyper V and VMware in current and past positions but nothing too intense or on a daily basis. My question is where do I begin as fair as Virtualization certs go and what are some of the various paths, most valuable certs etc?
I know with other certs you have CCNA into CCNP, MCSA into MCSE etc. What are the common paths for Virtualization?
I am posting this because I am in the process of wrapping up CISSP studies and test in about a month.
After that I would like to get my feet wet with virtualization since it really interests me and I see it definitely continuing to grow. I have worked a little bit with Hyper V and VMware in current and past positions but nothing too intense or on a daily basis. My question is where do I begin as fair as Virtualization certs go and what are some of the various paths, most valuable certs etc?
I know with other certs you have CCNA into CCNP, MCSA into MCSE etc. What are the common paths for Virtualization?

Comments
The Associate level, which for the most part only came out recently, isn't really worth going for unless you just have free time to spare. No one recognizes it yet, and I doubt they will much in the future unless it changes dramatically. It's more of a sales engineering cert, similar to already existing ones.
The Professional is the starter cert, but it's closer to a CCNP level of knowledge versus CCNA (relatively, and in my opinion). You need this to get higher level certs, but you do not need the Associate to get the Professional. In addition to passing the exam, you also need to take a VMware approved course. The official 5-day courses cost $3-6k - which turns many away. There are ways to meet this requirement for $185 though - read the forum. This is by far the most popular and known VMware certification, and is considered very good in the industry.
The Advanced Professional comes in two flavors, and I believe is most if not all simulations, where you need to meet objectives in a timed manner. I've heard it is quite difficult and requires in-depth knowledge of how to do everything quickly, not just correctly.
The Expert level requires you pass both Advanced Professional exams, plus put together your own design and defend it against a team of VMware judges.
I have no idea about Hyper-V, but I believe there is only one MS certification for it (could be wrong).
Blog >> http://virtual10.com
I'm currently working on my VCP-DCV which I'm hoping to knock out before the end of the year!!
*Bachelor's of Science: Information Technology - Security, Master's of Science: Information Technology - Management
Matthew 6:33 - "Seek the Kingdom of God above all else, and live righteously, and he will give you everything you need."
Certs/Business Licenses In Progress: AWS Solutions Architect, Series 6, Series 63