Have you checked out the ES eyepieces? (See:
http://explorescientificusa.com/collections/eyepiece ) I have their 100° 20mm, which seems to be their best value, and it stacks up pretty well against the 21mm Ethos for ~1/2 the price (I have tried them head-to-head). Their 82° series are very competitive too!
I would recommend having a look through someone else's 100° eyepieces before you take the Ethos plunge to make sure you don't mind turning your head to get the full view! I acquired a 13mm Ethos a while back, but sold it in favour of keeping my 13mm T6 Nagler...
Remember the wide-field eyepieces are generally very big and heavy too (think hand-grenade!), so they can be fun to balance in a dob. (Another reason I kept my T6 Nagler.)
Have fun looking!
Dean