Hi guys,

My recent camera history is almost all with Canon... 350D (Rebel or whatever they call it i the US) then the 40D and finally making the step to full frame with the 5D2
All good cameras, but i must admit that the IQ of the 5D2 is awesome.
When an SLR is inappropriate/inconvenient I often carry a little Panasonic LX3, which is a funky little beast and gives surprisingly good results.

I have 3 canon zooms (17-40 f/4L,24-105 f/4L and 70-200 f/2.8L IS)

The 17-40 is the most recent addition and sort of replaces the Sigma 10-20 (16-32 equiv)  I used with my 40D. This was a good lens but does not fit my new camera.

I only put skylight/uv filters on if the conditions aren't good and i want to protect the lens. Other than that i prefer to leave it off as I also think that even the good ones can degrade the image.

...and 2 primes (canon 50mm f/1.4 and sigma 105mm macro). No "L" grade primes yet!!!

Both are really sharp (especially stopped down a bit, this also controls flare in the 50mm). The sigma is one of my sharpest but the AF is pants.

The 70-200 is fantastic, especially if stopped down to f/5.6.  Funnily enough I think this lens works a lot better on my 5d2 than it did on my  'old' 40D. This is my fave lens, but it is heavy and not at all inconspicuous. People have come up to me in the street  to ask about it.

The whole prime vs zoom is an interesting one. As Adam says It's all about compromise.
Although in my experience the thing about primes being better optically is true, but less so as time goes on (or perhaps as my zooms get upgraded:-)). Some really good zooms seem to give the primes a run for their money. i think David is doing it the right way. Cover the normal range with top notch zooms and then get primes for when you have the time etc to get the shot lined up, or if you can move. This can be a real pain if you're all set up on a tripod.
Perhaps using one of the free apps that enables you to look at which focal lengths you use most often and then get a prime for that (eg http://www.cpr.demon.nl/prog_plotf.html).

Most of the time I have a zoom on the camera simply for convenience (the 24-105 lives on it). Better to get the shot you want with a zoom rather than miss it as you're changing lenses
 I like bruce's comment about using the feet to zoom but i'd probably end up falling over /off something if i did that all the time :-)

Wishlist:
I am rather tempted by the 85mm f/1.2L  (some of the portrait shots i've seen from this are amazing).
If i got a 400+mm it would probably also be a prime.
Now i just need to sell a kidney to finance it.

As this is my first forum post and i have waffled a bit I'd like to end with a question.

What do people use for landscapes in terms of ND grad filters etc? Is using the square filters (cokin etc) better than the screw-in circular types.

thanks

Nick