Figured I would chime in here seeing as how I have been daily driving an SLC with these coilovers on it for quite awhile now. I am thoroughly impressed with the ride comfort / ride height ratio. I realize that you say you are not concerned with just how low they go, and mine is not completely slammed (still lots of thread left) but these are great for the street from my experience. As for performance- they definitely beat out an old stock suspension any day- and definitely even a brand new stock suspension or cup kit for that matter. These do not compare to my B&Gs on my other Corrado however performance-wise. The JOM are much softer and less responsive (which is what makes them so comfy on the street). We are currently working on production rear torsion bars which should pair nicely with the JOMs to take out some of the roll and make for a great street combo that offers better performance at a budget friendly price. Overall for the money the JOMs are hard to beat, especially considering we offer a 2 year warranty on them and you can deal directly with us for warranty claims and not Germany.
Here's a snap of my SLC on JOMs