I would like some suggestions on a speaker upgrade for my 2012 Ford F-150. I have the standard stereo and although it's very bland sounding I wasn't willing to pay for their Sony upgraded sound system. What I'm looking for is a speaker and amp upgrade but I would like to keep the stock stereo as I really like the aesthetics of the truck and don't want to alter the look. I have two rear speakers and two fronts both in the doors as well as two tweeters that I'd like to replace. If I need an amp to push them I would also be willing to do that as well. Not interested in a sub as I need my rear area for work gear and kids. I don't really have a set budget but I would prefer to stay under $750. Thank you for your replies.