As for a recommendation, I gather you have a 25mm EP already? If so that should be ok for a reasonable low power EP. I did nothing but use a 25mm Plossl for years in my 8" and 12" and was perfectly happy.
An inexpensive mid power EP I have used is the GSO/Bintel 15mm, which is very good for the price. See
http://www.bintel.com.au/Eyepieces-a...oductview.aspx both Bintel and Andrews sell these. Nice 68deg AFOV, fair eye relief at 15mm and it works well in my 8" f4. In a 10" f5 it will give 83x.
Malcolm