For SQ, I'd look into Image Dynamics and certain lines of Resonant Audio. RE is probably not going to fit into a budget of $500.00 though. JL's are easy to find and good with SQ as well. Whatever you go with build the box for the sub or it will not sound good.
I've got Galfer lines Front and rear with EBC HH pads on the front. Haven't had any issues with Galfer lines. I agree about the rear not being needed though. I got it because I like the look.
Wow that's amazing that they are still open. Wonder if the layouts are still the same as what they were back then. Lagonda was my favorite though. This was back in the 80s though. NBL days. I had a GT, Hutch Tim Judge model, and Profile.
I've got the GP Pros and like them a lot. Tried on Held Phantoms and would have gotten them if money wasn't a factor. Got a great deal on the GP pros that I couldn't pass up. Never tried on Dainese.
Just wanted to say Thanks to the Coshocton crew for putting this together. I had a great time, especially the damn loop. It was good to meet everyone also. Can't wait for the next ride.
Not a cruiser guy but did ride my brother's M109 last year and was pleasantly surprised by it. If I was buying a cruiser it would definately be one of those.