OK, so I went to my local outfitter and had a look at the 22 Mags. I loved the 10-22, but it was too rich for my blood right now. I thought I'd let you know that I went for the Marlin 882 SS. It was affordable and felt good, even with the bolt.
I must add that I also tried out a similarly priced Remington (not sure of the model), but it had to be the most uncomfortable rifle I had ever shouldered. .22 Mag, semi, synthetic stock, open sights. It looked good, but didn't suit me when shouldered and the sights were terrible.
The Marlin is as close to weatherproof as I am going to get without shrink wrap, and surprisingly I like the sights. I thought they'd suck, but those glow dots are effective in low light.
Now to shop around for cartridges for it. Locally I can get hold of Winchester, CCI Maxi-Mags and what looks like my current favorite, the Remington Varmint Loads