A place where I can trade both common and rare currencies?

Hi all,

New to this world, did a bit of reading, decided on 6 currencies I want to invest in:

Some of these are very new/risky, but the major sites don't offer them. I looked at:

Ideally, I would like to have all my transactions centralized in a single site instead of being spread across multiple sites. Any suggestion?

Thanks,

Simo

Cryptoflame