I'm not a huge fan of the D3's Pentile display, either. That's not to say I think everything looks terrible on it, but some things don't look so great. I actually don't mind the way most webpages look, but some of the images I have in my Gallery look sort of crappy. This is especially true when I use SuperDim to keep my display from devouring the battery. With the brightness cranked up a bit, things look sharper.
Sadly, I do prefer the display on the D2G. When I mess with it now, though, it seems way too small. I prefer the way the D3 fits in my hand, but-yeah, its display is not my favorite feature.
I can see how the "D-Pad" on the D3 keyboard wouldn't really suit your needs. I've yet to play any of my NES/SNES games on my D3, but I used to play them on my D2G. You could probably get used to it, but I see what you're talking about. For someone who bangs out lots of emails, the dedicated number row comes in handy. For a gamer, it probably wouldn't.
As far as I can tell, the D4 is still just a mirage. Unfortunately, there are so few Androids with physical keyboards that you're probably better off waiting to see what the thing actually looks like and how the keyboard is laid out.
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