BINTEL (GSO) dielectric diagonals are very good & excellent value for money.
Having had one with the SCT screw on adapter on a Meade 8" LX90, I actually recommend getting a 2" visual back & then a diagonal with the 2" nosepiece that slips into it...
I found the screw on diagonal to be a PITA just quietly, requiring several goes at getting it tight & in the right position.. whereas, screw on a 2" visual back & then just slip in the diagonal & tighten the thumb screws.. far easier...
As to eyepieces... how much do you want to spend? There are plenty of 'budget' or less expensive eyepieces that deliver great views...
Cheers
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