Suggestions On 8" Woofer

Looking for suggestions on an 8" or 6.5" woofer to be used in a bass cab to be topped by separate HF cab using Fostex ff85wk for HF. Like to stay in a $25-$35 price range similar to the PE DC200-8. Will be crossing around 250-350 hz. Any suggestions on cab design would also be appreciated. Thanks for any and all suggestions.