First, never heard of Vogtland springs.
Second, how were the struts "custom matched to work with these springs"?
Third, camber kit always recommended.
If it were me, I'd stick with something a little more known and tested. The GR2s are good stock replacements but you may want to also look at the Tokico HP (blues). There is a
Group Buy for $325 shipped. And I picked up some used springs in the for sale section for $100. Camber kits always on sale at
Truehonda. Then install it all yourself with
Mex's DIY. Don't forget to get an alignment afterward too.
Looks like your $500 budget is blown, but unless someone can verify Vogtland's quality, I would try something else. Eibach and Tein have good springs with small drops, check the
FAQ. That's all I can think of. Good luck.