I have a E53 X5 3.0i with the standard stereo.

I did a quick forum search and it looks like changing the tweeters and midbasses in the front would give me a noticeable change in sound quality.

I don't want to spend a whole lot so the BSW setup is definitely out of my range.

Is it possible to purchase something like this and just simply replace the tweeters and speakers? Will I run into any problems? I don't plan on using the included crossover
Amazon.com: Phoenix Gold RSD6CS 6-Inch Component Set Speakers: Electronics