Unfortunately, they all are a bunch of ripoffs. I needed a complete new system w/ new speaker components, subwoofers, and amplifiers. It took me awhile to find one that was reasonably price. But he lacked troubleshooting skills...? And almost couldn't complete the install!
Most places wanted to charge $1000 for installation + prices for their own components! Otherwise it would be $1500 for installation of components bought outside their stores.
Do you need a recommendation? Install it yourself to save money. If u have an IS300, I can help you look for documents on removing the dash, and for $80, u can get a JDM stereo dsah kit that fits our cars... its fairly simple to remove the dash... But if you want a professional, I can recommend you to a place, i guess you pay for what you get for...