My two bits - I have a zen I am upgrading right now -
- The steering is among the best I have seen in a small car (my dad has a brand new estilo and I can see the difference). Its light, responsive and easy to handle: have it checked out by a mechanic before you change.
- Sony Xplode 270 - 3900 + 850 per speaker
- Sony Xplode 470 - 5200
- Pioneer 2050 - 3900
- Pioneer 3050 - 5400
The prices at an authorized Maruti dealer are almost twice this (although its for newer models, the functionality is the same). Am not really an audiophile and would like to save up money for a new car, so am not really going the whole hog on this.
Leather seat covers I had thought of, but had it before and in this heat it really sucks - becomes sticky and unmanageable.