Dell Vostro v13 Ubuntu version gone

Dell recently began offering a new business laptop:  The Vostro v13.  The form factor seems perfect for working in airline coach seats.  The hinged screen is offset toward the keyboard, which allows the screen to be opened farther without hitting the seatback in front of you.  My Ubuntu-powered Inspiron 1525 is just a little too big, and I spend about 15 hours a month sitting in coach.  Dell was offering a stripped-down v13 with Ubuntu for less than $500, but it disappeared from the website after Christmas.  The sales agent I chatted with didn't know why they discontinued the Ubuntu model.  I was planning to buy a Wndoze version to get a faster processor, then add Ubuntu on my own (actually Kubuntu - I like KDE).  Does anyone know why the Ubuntu model was discontinued?  Has anyone run Ubuntu on the v13?  Are there any installation or compatibility problems?