I went with kee audio as well. They have the least expensive sail panel replacement subs. I had them shipped to Buffalo to usaddressinc.com and picked them up. They sound good, but if you are looking for a sound upgrade, get a stealth sub box, 4 channel amp for sub and power upgraded front speakers. Doing that, I wouldn't even bother connecting the sail speakers and leave your hatch speakers in for rear sound filling.