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Ah, well in that case don't stress pixel scale. If you are under sampled, dithering will help get some resolution back and if you are over sampled, you can downscale the final image if you don't like the look of the stars. The only other advantage of binning, reducing noise is not really an issue with modern cmos cameras like the 2600 when the read noise is already far below background noise. You'd need some seriously dark skies to see any advantage there. So really the only thing you need to consider I how much effort and cash you want to put into your photos. OSC is quicker and easier and cheaper than mono but restrictive especially in a light polluted area. Either way though I'd still recommend a dedicated and cooled astro cam over a dslr if you have the cash for it.
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