K well I would look for like 2 15's if you are gonna remove the back seat. Prolly stay under the window line with two 15's (idk for sure tho) I know a guy who does good designs (me lol), maybe two DC XL 15's, on a DC 3.5k to brand match, That will put you at like 1500 (prolly?) figure 500 for a nice pioneer double din, then like 200 for a battery, 200 for wire, 100 for wood, and then maybe some deadener. or cut back to lvl4's and a 2.5k if you need mids and highs too. just a suggestion, by no means is that the only way to accomplish what you want.