i have the same gun and i put a Nikon Prostaff 3-9x 40mm scope on it for $160. clear, holds zero well, and won't break the bank. it also has a lifetime guarantee that is pretty good. if it ever malfunctions for any reason, ever, i can send it back and get it repaired/replaced, no receipt required.
for the money it's a great deal.
i posted some targets i shot with this gun in the range report section. (here is the thread