Currently I have one ported 12" alpine type r on 600W rms in my jeep liberty. I'm not sure I'm completely happy with the SQ of it. I was looking to switch to four 10's sealed, which should fit perfectly along the back of my rear seats. So each sub would get 150W/each, with the possibility of MAYBE upgrading to 300W/each (1200W amp) in the future. I'm thinking around $300-400 budget on the subs ($75-100 a piece). I'm looking for something with a somewhat high sensitivity, (I'd say 86 db or higher).
My local car audio shop said he was impressed with these fusion pro 10" subs (the encounter or performance series I believe) and that if I bought four, they would be $50/each. The specs online look pretty good, but I'm not sure how much I trust them and I can't find much elsewhere online about them.
Other options I was looking at were the Alpine SWE-10S4 for $55/ea and on the more expensive side, JL Audio 10WXv2 for ~$90/each.
Any suggestions are appreciated! It's hard to sift through the BS reviews and youtube videos of the sub playing some bass heavy rap song.