A lovely shot Jerry with nice tones to boot. Like your composition here too. I've tried shooting this jetty landscape, and it doesn't work too well. I have a 5D MKII and all I would say is, if your happy with what you've already got and it does the job, then why the need to change. I personally tend to go for image quality over anything else. 1D to me says Pro or as near as and if one day i'm good enough to warrant one, then it's the way forward. But the reality is, i've seen people on EPZ with better photos than I could ever hope for using a 40D. The 5D MKII has masses of potential in the right hands.

Not sure if that helps with your dilemma, but I hope it's of some use.

That's a lovely shot mate, your composition is spot on and I like how you've managed to get in more of the mountains as it gives a much better feel of the place. Looks ever so slightly over sharpened, but that might be my monitor. I always tend to selectively sharpen, and normally mask out the water, not sure if you've done that here, but I know you like water to look like water.

Nice shot, and a cracking sky. My only minor critique would be that the blend between the sky and land is telling. it might be worth blending this in subtly with a brush and build it up so that the transition is smoother.

Great shot! Although a popular spot,I've not seen one from this standpoint. Nicely composed and framed. Its always worth leaving a little extra room for when you correct the verticals

Nice shot jerry. Re. the dark edges, you can try a couple of things post processing, one is the vignetting tool, PS and most photo editors have this or in PS5, if you select 'lens correction' under filters, it allows you to choose what camera you have aswell as the lens, then you can can tick the vignetting box aswell as the geometric correction ie. lens curvature, can't remember the exact term, it also has a 2nd tab which allows you additional control over the vignetting. I hope this helps.