I am considering a Kel-Tec FRB 18" barrel (in .308 cal) and just wondering what to consider to top it. It is not for long range but want descent magnification at least up to 50 yards. I am after good VALUE...something that is reliable but won't break the bank (like a Toyota, not a Yugo but not Mercedez either). I do believe in buying once and crying once so I want to avoid "junk". If it matters, I wear glasses and I am near sighted. Thanks for any leads/pointers.