I've been kicking around two upgrades for my IJ... Pinsound or Color DMD, I had to pick one for now... I chose Pinsound... and holy shit! Pinsound on IJ, with Endprodukt re-mix will knock your effin socks off!!!!
I had upgraded my speakers with pinball pros years ago ... at the time I thought that was a decent upgrade but it didn't really impress me. Well... now with Pinsound ... my IJ audio is brilliant, rich and in-your-face awesome... not to mention it shakes the gameroom (not kidding)! Funny thing is I have a shaker in my IJ... the sub, when its cranked... actually shakes the cabinet as much as (probably more than) the shaker motor!
I couldn't stop and laughing ... some of the new call-outs are hysterical... the whole experience it was so intense and so awesome. A truly transformative upgrade.
If you have an IJ... and you love the game... this is a MUST HAVE!