I LOVE my pentax. The IS is great

I like that you can use almost any lens that they have ever made except the old screw mount ones of course.
I went from a Pentax k-m and I was going to save up and buy the K-7 but I don't need the video so I decided to buy a used K20d and i'm very happy with my decision. If you want to see some results of the K20d I just just posted this thread.
http://www.thephotoforum.com/forum/...-gallery/232587-first-boudoir-shoot-nsfw.html
Pentax is a little noisy-er but it leaves more detail so if you want to remove the noise in PP you can do more and loose less of the image detail.
Thanks, I was just looking at those before I opened this thread...theyre awesome!
Having no working knowledge of "noise" my understanding is that at higher ISO the noise is worse? so if im shooting ice hockey i think the ISO will have to be pretty high, so more noise vs canon?
that being said the ISO goes higher vs the XS so at 1600 would the pentax be better because the XS would be "maxed out"? or is that where I would see the advantage of a canon?
or am i just 100% wrong about all of the above lol.
I'm going to give a slightly better explanation of your questions...
Basically the noise-to-signal ratio gets higher the "faster" your ISO rating. What I mean is the higher the ISO number, the more noise that will be apparent in your final product. Different camera bodies handle it differently: A P&S with a tiny sensor might have pretty bad noise at ISO200 while a Canon 1DMkIV will be almost completely noise-free at ISO6400 (with very little at ISO12800). It's different for *every* body.
As for shooting ice hockey...it depends what level it's at. If you're shooting professional or semi-pro...you won't need high-ISO at all. I've shot professional hockey at ISO100 and still had enough shutter speed to stop movement (around 1/800 or so). That brings me to my second point...different camera bodies have different ISO ratings. My Canon 7D can let more light in at ISO1600 than a Rebel can at ISO1600. That means I can use a lower ISO rating to get the same picture. This isn't usually a huge difference (even the difference between a 1D4 and XT is probably less than 1 full stop), but it's there...which means it's hard to compare evenly.
Now...for the "maxing out" question...no. Just because a camera has a range that says, for instance, ISO200-12800 doesn't mean that range is completely usable. It may start having severe noise issues at ISO400 (not that it does, but just explaining a point). The total range is almost useless in real world. There's a reason that "highest ISO" is usually listed separately...it's usually not even part of the standard ISO range. You almost always have to enable it somewhere in a deep menu...and there's really almost no reason to since that ISO rating is almost *always* completely useless (unless you've metered *perfectly* and it's the only way to get the shot). I *have* taken shots at ISO12800...but even on my camera (which costs 3-4 times as much as that Pentax) it only produces usable shots if I can spend some time PPing out the noise.
Now as for the actual comparison. Don't look at the specs at all between the 2. It has a slightly larger sensor, built-in IS, face-detection via Liveview (useless), and a few other things...but none of that should really matter when comparing cameras. The thing that matters is "How good are are the pictures?"...and in this case? The Rebel kills that Pentax.
That's not to say the Pentax makes bad pictures or there's something wrong with the camera...but the Canon will almost *always* take better shots in the same condition. Add to that that the quality of lenses available will almost always be better with the Canon...and that *should* be your inkling I'm putting down subtly.
Either way, it's definitely your decision. Go out and try them both. Try them using every ISO setting, every lens you can get your hands on, and play around with the menus and settings. See which one *YOU* like, because that's what matters in the end.