I just want to replace the current speakers and add an amp to them not add anything
In that case, the Kickers mentioned above are a nice option. You have six speakers total (the front two are wired together on each side). Sometimes putting both the door and dash on a singe amp channel can make the dash speakers way too loud compared to the doors. You can offset that using resistors somewhat and play with the load on each speaker.
Another way, which I like better, is to use a six channel amp and run new wires to each speaker. That way you can use the gain controls in the amp to balance the output. Even better, it makes it very easy to decide to add a small DSP and get full control over everything.
As far as speaker brands, I am a huge fan of Audiofrog. Of course, they come in at a higher price point than the usual Kicker, Alpine, Infinity stuff. Do you have a budget in mind for everything?