If you are asking for advice on what grinder to get, you might give an idea on the budget you are working within and then more proper advice can be given. I built my first razors on a 4x36 grinder like mentioned here:
http://straightrazorpalace.com/forge...ake-razor.html
Some have built razors using a regular belt sander upside down in a vice...so sometimes it's more about how creative you can be than the tools. There are the "grinder in a box" systems (Undream did a nice thread on this system) that are rock solid and the complete systems like the KMG or Bader grinders as well, again, it's about your personal budget and your abilities/creativity. When you are doing your search, try searching for knife grinders & you will find more options.