The lvl 4 or lvl 4 xl?The level 4 would be your best bet for 1500watts. I've actually seen level 3's run 1500wrms for burps and they held up fine. but for daily the level 4 would be the safest on 1500watts.
Q might sound a bit better, but the Level 4 in my opinion will get a little louder..//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifi've got the same amount of power and after talking with KHARPD and Rusty (DC vendor/sales guy) we figured out that a single Level 4 15" in 3.5 cubes would be ideal for what I was looking to do. just to make sure I made the right choice I'm got an Fi Q 15" that i'll be reconing soon to see which one sounds better and hits harder if any difference.