Soooo... I got the springs and spacers installed! Not at a shop, but with the huge help of a fellow the370z.com member - ClemsonWill. I really can't thank him enough. He was very knowledgeable, and also very patient with me since I don't (now didn't) have experience doing that stuff. The only thing we weren't able to do ourselves was the front springs (we had to take them to a shop with a heavy-duty compressor). I'm not sure how long the actual work took, but we worked at a pretty leisurely pace, and it didn't take anywhere near 10 hours. It wasn't very difficult either, and I'm sure if we had to do it again it would take much less time.
To me, the ride feels pretty much like stock, but it definitely looks much better. It does have some negative camber now, and I'm going to get an alignment in a week or two that will hopefully take care of it enough that I don't need a camber kit. Once everything has settled, been aligned, and cleaned, I'll take some pics. ClemsonWill took some pics right after the install at his place -
ClemsonWill's Journal
Anyhow, thanks to everyone for their input (and a
BIG thanks to ClemsonWill). I'm very glad I didn't go to a shop. Not only did I save some money, but I made a new friend!