Within a week of owning my '98, I had an Eclipse 6600 installed. Dual disc drives (which means I can watch a movie while always having nav going at the same time) and full iPod integration so that it will display all the track info on the screen, and I can control the iPod through the touch screen as well.
I have been so incredibly happy with the system and with how it looks.
Here's a pic before:
And one after:
As you can see, they moved my climate down on slot (took a little work to get it to fit, but they made it happen), and left me a slot to put my phone, etc girlie stuff in.
Total cost, with install was about $1400... but that's because I got the unit at cost, and the labor was next to nothing (I'm friends with the owner of the shop that did it).
Edit: I hardwired a V1 in using one of the dozens of walkthroughs available on the internet... so it doesn't look as crappy as in that last pic anymore, haha! Also, this frees up my lighter so I can test out other radar detectors (I'm in the business) and compare them by side to the V1.