The best one I have found so far is the M&K MX350, quicker than my MX5000, but less powerful. I found the Rel ones slow. I liked the Velodyne DD12 and DD15, they are fairly quick also.
The M&K 350 is difficult to find in decent nick, expect to pay around £350 - 500 depending on condition.
I use M&K because they are relatively quick, pretty much unbreakable, go fucking loud and deep, with quite a bit of flexibility on settings.
Great news Exchanged a couple of messages already and they seem nice. He rates it highly and I was considering the Palmer on Icon Audio website but for a little bit more I thought this was a good deal. It’s 331/3 only but I’m trying to get a 45 rpm pulley for it
Only thing is there’s a viscous damping gel in each tower that can leak if it’s at an angle over 5 degrees or so. So really need to keep it level and I’m not sure how level it is in the car, as it’s basically folded down seats. Will work it out somehow.
The tops are used for height adjustment I think and I believe the gel is right in the bottom but not accessed via the top. I’m making assumptions here though.