Hi Phil,
Have you checked out dpreview website? they give excellent very searching reviews of virtually all cameras.
The review conclusion of the Pentax K-5 scored 83 whilst the Canon D7 scored 84. The site has facility for comparing cameras side by side. The reviews are quite technical, way over my head, but very well written and I think they can be relied upon.
For Lenses, take a look at Fred Miranda website (
FM Reviews -) dedicated to Canon & Nikon, but the members give their opinions of all the 3rd party lenses, it's a good guide to Lens performance. I do wish they would include the Pentax lenses, but they do include Tokina that's part of the Pentax group.
I have the K-5 along with the Pentax 17-70 Lens, it is a serious bit of kit, it brings a smile to my face every time I use it.
So far, it's the best camera I've used over the period 1947-2011, yeah! from the day's of plate cameras & wooden tripods to todays modern offerings, I've had & tried them all.
Get the K-5, you won't be disappointed.
Regards,
Roy