I'd strongly encourage saving enough money to buy a premium widefield eyepiece...in the end you will be ahead (in my opinion).
Not only will you get the benefit of the wide field and high quality optics but if you ever decide to sell it you are more likely to get a higher percentage of your purchase price back (of course depending on currency exchange rate)..just shoot for an exit pupil of 2 and you will be in business.
I have currently or have owned the following in and around the focal length that you are looking at...
13 mm T6 Nagler
11 mm T6 Nagler
10 mm Pentax XW
7 mm Pentax XW
The 11 mm T6 Nagler was my first premium eyepiece and it worked a treat in my 8 inch reflector dob...I really liked it a lot.
Through a long chain of events and the aquisition of some other scopes I got the Pentax XWs...I then traded the 11 mm Nagler for the 13 mm Nagler. The 11 and 10 were just too close together and the Pentax just edged out the Nagler for the purposes I intend to use it for...but it was a close hard decision and I do miss the 11 T6 although it would not have seen much use and the 13 fit my line-up better...
I would gladly/proudly recommend any of the above.
Good Luck and Clear Dark Skies to you!
|