Spacers are not a performance upgrade, so I wouldn't fit them if I was you.
Eibach ARBs are very good, and definitely worth the cost. Don't forget new drop links, too.
I run the BC Racing dampers and springs on my MR2, and on full soft they are easily comparable to stock, i.e. soft and floppy. If the Zed ones are the same, I would expect you to be able to run a setting that is more than compliant enough on the roads, whilst allowing you to stiffen them when you want to. In reality you'd normally just find the right balance and stick with that.