oh yes eggplant is a great colour!
ive seen this beautiful ink
http://cgi.ebay.com/AUTH-BALENCIAGA-INK-TWIGGY-2006_W0QQitemZ170252542829QQihZ007QQcategoryZ63852QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
but its a twiggy, what are they like?
Eggplant is my fave of all purples too! The Twiggy I would say holds less than a City would. It really depends if you carry a lot or just the normal, mobile, keys, wallet. If so, then the Twiggy will be just right for you! Good luck deciding!!
If you want a brand new Bal with color close to Ink, you could try 2008 Marine. At least it will be easier to acquire than Ink. 08 Marine is dark blue, one shade lighter than 07 Marine. Of course, if you like purple, you could try 07 Violet or 08 Sapphire. City definitely is the best style to start with. Have you decided to have RH or GH?