So this year, I'm considering replacing the subs and speakers in my car, which has the Shaker 500. While I am impressed with how decent the Shaker 500 sounds for a factory stereo, it could use improvement. I had Infinitys all the way around in my old WRX and the mids and highs were amazing. Are there any speaker recommendations that would complement the Shaker 500 subs, but add a decent improvement in regards to mids and highs on a budget?