wow, thats expensive!!!!
If you're willing to take vacation days, come up here and get it done at SupremePower. i had my KW done at SP! and I can assure you they dont charge you $450.
Oh, and whoever shop told you that the install + realignment =$1000 is BSing. You're supposed to align after 2 weeks at least, for the coilovers to settle.. and my BMW dealer charges $159 for realignment and $140 from a local Bavarian shop.