I went all out and bought a TeleVue Everbright for use on my Takahashi FS-102, an excellent diagonal, very well made.
I also bought a BinTel 2" Quartz for use on my SW ED80 Pro, whilst the build is not up to TeleVue standard, the view through it is excellent, not that much different to the TeleVue, the only issue I have had is that the 2" barrel became loose, I fixed that by putting a drop of Locktite on the thread.
I suppose it depends on how much you want to pay, the Everbright is used on the FS-102 to enhance it's superb optics.
Cheers
JohnG
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