Dynaudio 72 vs. Dynaudio 1.3 mkii


I currently have a pair of the Audience 72's which I like quite a bit. I have read that the 1.3 mkii contour would be a significant step up in quality while sacrificing some bass output. The problem I have is the 1.3's are rear-ported and I would only be able to position them about one foot from the rear wall. The 72's are front-ported so I don't have that problem. My question then, is it worth upgrading to the 1.3's under these conditions? Am I better off staying with the 72's with the front port? My associated equipment;

McCormack DNA 125
Rogue 99 Magnum
Cary 303/100
Thanks.
jimmymac
Thanks for your input. I'll probably stay away from the rear ports until I have a situation where I can get a little farther out from the wall.
I auditioned both while buying new speakers (because of discounts I could buy them for more or less the same price). I finally concluded that the Contours were better. However, the difference was not dramatic. It took me really a while to hear, only with specific songs, that there was a qualifying difference. In my room the Contours tend to boom if placed near the rear wall and I have then to insert the thing (forgot how you call it in English) in the port to solve that. A front-port would be a real advantage in such a situation.
Hence, in my view (hearing) it is probably not worthwhile to make the step to the 1.3 mkii's. The difference is not substantial enough to justify a large spending and there are some disadvantages (port + you will also have to buy good stands). You better save up the money to make in the future a more substantial step (the contour 1.3 SE?, the twenty five, or the new contour series?).
Of course, things me be different with your equipment.
kees