I like Kenwood products (I have a headunit and subs) but their speakers are sub-par. Here are what I have. I spent around a month going store to store, website to website to find the best sound for my budget and this is what I came up with...
Front Speakers and Tweeters
^ I'm nearly positive those are them. Install was easy too. I had to drill new holes for the back (easy) and I bought brackets for the front that fit perfectly ($10 for two). WJJEEPS also has a write up on which wires are which so you can wire them correctly.
I bought my speakers locally (front and back) for $215.
Now, the tweeters are tricky. The WJ's have very large tweeters (much larger then Alpine's). I couldn't find a bracket so I had a local audio store do it for me ($30).
So, a full speaker upgrade, tweeters and all would run you about $275 depending how much you get the speakers for.