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Peter,
For the extra money, I think a 10" scope is the way to go.
The 8" inch specs above will give you magnifications of 1000/25=40 and 1000/10=100.
The 10" specs above will give you magnifications of 1255/20=63 and 1255/10=126 roughly.
I would prefer a lower magnification somewhere between 40 and 75 and a higher magnification range somewhere between 150 and 200. The lower range for wider fields (e.g. clusters, nebulae, large galaxies) and the higher range for smaller objects (e.g. planets, small planetary nebulae) and splitting closer double stars less than 5" apart.
So, for a 1255mm focal length you need an eyepiece closer to 7mm as 1255/7=179 magnification.
Maybe they can do a deal on another eyepiece, or swap the 10mm.
Regards, Rob.
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