"The fast wide prime is seriously missing in the DX lineup. No matter what Nikon classifies the 35mm 1.8, it is not a wide angle prime (as said on their website). It might be wide on FX, but no one is going to use it on FX (maybe with a few reservations). It's a fast normal for DX."
Quite agree with that. I usually have it on my D90 and swap it with whatever. To give the devil his due, wides can do with less shutter speed (generally), and still stay 'sharp', so the 'stop' that we lose in speed, we equally lose or gain in shutter.
"The 17-55 is just as heavy as the 105mm macro. Which I've had for about 2 weeks. I haven't carried that lens for an entire day (and I don't plan to). The biggest problem now is that my camera bag won't fit it. It's an odd combination- a D40 with a 105 macro."
My 105 macro is of older design, perhaps 1989 or so. It gets double duty as a portrait lens, too. It works very well and is much smaller than the 17-55.
"Just curious, do you shoot FX?"
Not at the moment. I vacillate on getting the D700 or it's replacement. My market will never care about what I shoot or the difference in product I give them. It would simply be from what difference I might get from it. It seems rather extravagant to shoot FX just for me when the IQ that is gained would be rather small in most cases.
Trouble is, that in some cases, it wouldn't be trivial.