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"Visit a viewing night or two with other people and look through as many different types of eyepieces as possible...become an informed consumer."- Wavelandscott.
I couldn't agree more before laying your money down!
It also comes down to how much you want to spend.
You need to keep in mind too the optical properties/capabilities of your scope. For instance EPs with >80degree field of view will introduce noticable, if not intolrerable coma distortion into the outer edge in anything faster than f/5. These EPs demand the use of some type of coma corrector in fast scopes. In my case of an f/4.5 scope, that makes for significant top heavy situation that warrants careful thought into counterweights/rebalancing. These EPs also are so wide that your eye cannot see the whole field without moving. Sure they give the 'falling into space' effect, but they are not for everyone. You really, really owe it to yourself to test these EPs objectively, & THEN decide.
I've tried one of these giant 100degree puppies in my dob. Too much coma distortion & way too top heavy, & that's without the coma corrector. I'm happy to limit my selection to 68 to 70 degrees. That also opens more possabilities, optically & practically.
Yes, better quality does cost, however, keep an eye out for those little gems that use clever, inexpensive designs. They do exist. For instance, I mentioned the GSO superiview 30mm. Good for my use now, but I will be getting my mits on a TMB Paragon 30mm- better quality, but also not a mortgage buster. The 15mm I won't change- I won't improve much on quality keeping in mind optical properties. I'm looking through the scope, not at it.
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