You know I'm probably going to get bashed and flamed for this but for the set-up in which it sounds like your aiming for, I wouldn't shoot for such a high end sub. Fi's are Nice and so are Re's but your not going to be pushing them if your only trying to run 250 watts rms... A good sub I recommend to the DD for good SQ is, and please don't hate lol... Rockford Fostgate P-2, 10 inch 2 ohm series... These subs are seriously under rated. There SQ is amazing, real rich and clear... Yes there no fi, or re or id but for what your trying to do I think they would work out nicely... There 250 watts rms so right on your range. I can get the p2's for 88.00 shipped if your interested, pm me.... Or if you want to go a stage louder, p3, but there 400 watt - 500 watt rms so I don't recommend...