Keep the tweets for the components within 8" or so from the woofer..
Adding dash speakers and getting the correct imaging can be tricky, best bet is to bandpass the dash speakers by using the HP filter off the amp and addin inductors to the speakers. Before you go too far, try the system with the comps first, you may like it. Adding more drivers can become a headache...
2008 Dodge Ram 2500 4x4 CTD.....lightly modded
2008 Dodge Challenger SRT-8 #3560.....lightly modded
2013 Jeep Wrangler Rubicon....lightly modded (yeah right, it's a Jeep!)
2010 Jeep GC SRT-8.....lightly modded