A lot of it will come down to personal preference.
I have the 150/1800 SW Mak-Cas, and it's great for viewing the planets. It does need a little "cool down" time before use. The 127/ 1500 would be a nice scope for what you describe.
Do make sure that the mount you get is one that can support the scope and any little extras, e.g. finderscope, camera, etc.
Good luck, and let us know what you go with.
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