Ok after a couple of months of being without a camera, I decided to take the plunge and get a PENTAX K20D my first dSLR with the SIGMA 18-50 and 70-300 kit lense (on backorder).
I am looking at getting the 10-20mm after a while.
I have taken some test shots (of the moon obviously) at high ISOs with the 50mm and am very impressed with the capabilities of the camera as much as I can tell with my limited experience. JPGs straight from the camera are very good with minimal noise.
Will take it for a spin over the easter break.
Thought I would share.
Cheers