reccomending places not to go is not something that we would like to see on this public forum. If someone wishes to advise against particular places then please PM MKEWAY with your concerns but DON'T post them up here.
Now, What I would reccomend is buying a good set of coil overs from people like Hikari Performance, Takakaira.com or any good online ordering store and having a reputable workshop installing them for you