04 kenwood speakers will give you clean sound....as they will be directly run from HU....
if you want some bass without woofer, then you need to get:
1. components in front doors-13K
2. better 6X9 on rear shelf- 12K
3. sound deadening in front door- 4-5K
4. decent 4 channel amp- 6-7k Used
5- Decent wiring- 2K
but still bass wont be at par as that of a single woofer which can be achieved as below:
- decent woofer used- 5k
2.box- 1k
- used 2 channel amp 5k
- wiring- 0.5K
hope it suffice your query.
sony or kenwood...it all depends upon your personal liking and taste..
you asked for stock setup ...so kenwood is the stock speakers for baleno.