Hi Rod,
In my search for my first dSLR, it came down to basically 3 cameras...
The D70, 350D and the *istD.
While I would have preferred to stick with Canon, there were a few things that finally swayed me to the Pentax.
1. Spot metering... In my view this is essential, and I cannot believe that Canon don't offer this on their 300D, 350D or even the 20D!
I mean many of their P.& S. models have it as standard, like my Pro1, S1IS. my previously owned G6 and A80. One must ask.... If spot metering (being a more professional form of precise light metering) is available on their consumer non-dSLRs for Sunday shooters... Then why is it left off their entry and intermediate range of dSLRs ???? Yes, I know the 20D offers a pseudo "partial metering", but this is simply not the same as Pentax's spot metering which takes a reading from 1% of the frame.
As I say in my sig motto.... Photography is 40% light.... Therefore, if you are wanting perfect exposures in difficult lighting situations... You need spot metering..... I mean, you are always on about entrants in these challenges that have the dreaded blown highlights... This is a result of the many photographers who use Canon dSLRs who can only use evaluative and partial metering.
2. Steel Chassis
3. Ability to use lenses made over the last 40 years, including bargain M42 screw mounts. For example I picked up the finest 50mm prime ever made for AUD$87 on ebay... A Pentax Super-Takumar 50mm F1.4 with radioactive rare earth element (made in 1964), which is as sharp as a tack.... Consider the cost of a plastic Canon EF50mm F1.4 by comparison.
4. Cost.... The *istD originally sold for AUD$2,700, just 12 months ago and competed square on with the Canon 10D.... Now you can buy them new for AUD$1,200 (body only).... That’s a fair saving over what we pay in Oz for a 350D.... Question - would a Canon 10D user upgrade (downgrade?) to a 350D??
5. Hyper-program.... Allows you to go into AV and Tv modes from P mode, simply by turning the two aperture and speed wheels on the fly.
6. Large viewfinder.... X0.95 compared to smaller Nikon D70 or Canon 350D @ 0.80X.
7. Handling.... Logically laid out buttons... I like the tactile feel of the camera
8. 11 point AF compared to 7 point on 350D, or 9 points on 20D.
9. AA batteries -Alkaline, NiMH, Lithium, or CRv3.... Never have to worry about dedicated batteries, and available anywhere at a pinch (Like my Canon S1).
10. Flash sync socket for studio work.
11. ISO3200 versus ISO1600 on 350D.
So far I've built up quite a reasonable dSLR system, for only AUD$3,000... But look what I've managed to get for my money.....
- Pentax *istD dSLR - Limited edition (Gold plated buttons)
with vertical battery grip..... (That's why I did not go for D70.. No grip!)
Lenses.... (Buying new and also from ebay)
Sigma 18mm - 125mm (Pentax mount)
Sigma 100mm - 300mm (Pentax mount)
Tamron AF 28-300mm f/3.5-6.3 LD Ultra Zoom XR Macro
Pentax - F SMC 1.7X AF adapter converter
Pentax - FA - SMC 28 - 80mm
Pentax Super Takumar 50mm F1.4
Pentax SMC F 28mm F2.8
Pentax Yashinon 50mm F1.9
Zenitar 16mm F2.8 diagonal Fish-eye Lens (Pentax mount)
Eyemik 135mm F2.8 (Pentax mount)
Glanz 2X extender (Pentax mount)
External Flash
Sigma EF-500 ST (Pentax dedicated)
Canon remote switch (Shutter release cable) RS-60E3 (Works on Pentax)
Now consider what the above would cost in Nikon or Canon equivalent
Rod... I know you lust for a dSLR system to replace your (excellent but aging) G2, and I know cost is what is probably holding you back. If this is the case, you should not rule out the bargains available in the Pentax system. Believe me, forget the body cost differences... Once you get a dSLR you may start to get "LBA"... Lens buying addiction

... And you will end up spending twice as much on lenses, flash, accessories than the body.
Look at me... $1200 for the body.... $1800 for lenses.
So if you are concerned about spending the $950 difference between the 350D or 20D ..... Then, don't get a dSLR.... This is only the start to your eventual money problems
Kind Regards
Richard Higgs
http://www.pbase.com/rhiggs1
See my Profile for Camera & Equipment listing
“Don’t feel you have to take photos of impressive subjects….
Rather, try to take impressive photos of any subject”.
Photography is 50% photographer, 40% light and 10% equipment.