hmmm. the u2711 or a new imac????
i need a win desktop, but i already have parallels. i prefer a mac os environment.
The Dell has CCFL back-lighting leading to better colors. You're better off buying the U2711 and putting the rest into a PC, iMacs use laptop GPUs and the standard 27" iMac only has an i5-2500s (low power variant).