Hi Alex
While you certainly make valid points in the context of eyepiece selection/critique in general I think the actual question was in a finite pick of having to choose between either a 8mm Hyperion or a 7mm Pentax XL which one would "you pick" ('You' - directed to IIS members). Based upon your comments it sounds like you would be congruent with the rest of us that the XL would most likely be the pick over the 8mm Hyperion.
On another note have you tried any of the higher FL XWs (eg 14, 20)? I would be interested to hear your thoughts as others often seem to criticise the 20mm XW but I find it to be excellent and certainly better than a 19mm Pan (on refractors which I use)
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