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Fox,
The world has moved on while the 15mm Panoptic has stood still IMO. There are now better eyepieces available for similar money, due to changes in technology and materials.
I would choose from the 14mm Pentax XW, 13mm Nagler T6, 14mm Denkmeier or the 13mm Vixen LVW with the top two being the 14mm Pentax and the 13mm Nagler T6. The Nagler has a larger AFOV and may be a little flatter than the Pentax. The Pentax has better contrast, sharpness and light transmission, hence it is the best for popping the "faint fuzzies". Some people dislike the slight field curvature of the 14mm Pentax, however IMO it is quite tolerable. I was using it in an F4.5 newtonian recently without issue. It is also worth noting that in your TV Genesis the field curvature will be barely noticeable and significantly reduced compared to what you would see in a fast newtonian. This is because a refractor has an inherently flatter focal plane than a newtonian and also because the Genesis is effectively operating at about F12. Considering those facts I would go with the 14mm Pentax XW but the 13mm Nagler T6 is also a fine eyepiece.
CS-John B
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