If they have to ditch an m3 bodystyle the it should be the 'vert without question as it is compromised as a performance car far more than the E90 M3 is - unfortunately it is all about marketing and sales and i expect that a lot of people who would not have normally considered an M3 have bought the vert for its 'flash' factor. It would be interesting to see world wide sales of E93 M3 vs E90 M3 but i would guess that the E90 would be lagging behind in sales.
2011 AW E90 M3 DCT - Current
2010 JZB E90 M3 DCT - Sold
2009 6MT E90 LCI 335i M -Sport - Sold