Hi Troy and welcome , nice scope you have there .
Simple maths says your 8.8 gives 136x , ( 1200 divided by 8.8 = 136 ) .
Personally I would get the 6.7 giving 180x ( 1200 divided by 6.7 = 180 ) as the 4.7 giving 255x will be a bit much as the seeing rarely allows that much magnification .
The ES eyepieces are very good ain't they
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You will see plenty at 180x also give a good GSO 2x barlow a thought this will give you 270x with the ES8.8 and a whooping
360x with the 6.7 .
What did the 8 inch come with ? the 10 and 25mm plossls ? if so the 6.7 and 2x Barlow will round out a good magnification spread of 48x , 96x , 120x , 136x , 180x , 240x , 270x and 360x
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One more thing that 360x is getting to the max an 8 inch will be able to use , the formula for any scope is about 50x per inch so 50 x 8 = 400x , laws of physics mate .
Brian.