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Your telescope has 1250mm focal length and is F/5.
I think a 5mm eyepiece delivering 250X would be good for planets many nights after it achieves thermal equilibrium, assuming people around you don't have their heaters going.
A 2X Barlow would be handy for your 9mm eyepiece giving 277X - but you might find it frustrating tracking at that power. Or you may find it okay.
The 12.5 Morpheus gives a 2.5mm exit pupil which would be good for galaxies and faint clusters. With a 2X Barlow, it gives 200X, which works for planets on more nights than a 5mm eyepiece, where higher power might be delivering mushy views because of the atmosphere.
Start at 200X, then bump up power progressively until one gets a lousy image, then step back. One can hold 400X on some nights of the year.
Your 25mm and 30mm eyepieces deliver 5 and 6mm exit pupils, which are very good for low power views at dark sites, but the background image may be annoyingly bright when viewing in a light polluted sky.
I tend to go for a 4mm exit pupil for low power in polluted skies, so would keep an eye out for a wide angle or ultra wide angle 20mm eyepiece in the classifieds.
Regards,
Renato
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