I also haven't heard of Nutek!
Kromer closed July 2012. Mr. Kromer retired. That business is tough when you have big box stores buying volume and Kromer simply wasn't being able to stay competitive on most electronics. I'm going to miss that place.
There are two places that I recommend for car audio;
I've seen and listened to some really sharp and tight sound systems being created by Ultra Auto Sound in Mississauga. I'd also give them a try.
The other sound system place I've known for 25 years is Number One Sound on College St. just west of Dovercourt. George Ruivo is the man to see. He's old school and knows his audio. His sound system on his E39 is super tight and crisp. The gallery on his website will also show you the really cool projects he's worked on.