Hey guys, as the title says I'm looking for a single larger sub to replace my two infinity reference series 1050W's but still provide the same amount or better performance. This is to save space in the back of my cherokee without sacrificing loudness or quality. I am running a infinity 611a sub amp and I would like the sub to match up well with it, it puts out 657 watts rms at 2 ohms. Being a student funds are a little limited but I was looking at the Sundown SA-12. Any ideas would be greatly appreciated. Edit* The Infinity's are in a sealed box dimensions 25.5 x 10 x 12, I Would prefer the box to not come above the back seats which is about 18", I could always have the sub facing up if the depth is shorter than the height but I'm willing to make exceptions. My biggest problem is with the length of the box because I don't want to put stuff in front of the subs I have a lot of useless space. so maybe 18 x 15 x 18, my budget is about 200 but I'm willing to put down a bit more for quality