@aydee47
Sir
What is your overall budget for sound system?
You should definitely change front & rear speakers (or at least front with components), or else there would be no use of changing Head Unit.
You should buy any of these HU which ever is available around 13K in your city
1.http://www.pioneer.com.sg/storefront2/aspFn/Product.asp?ProductId=992&CatId=2,24,33
OR
2.DEH-P5150UB
OR
3.Alpine Electronics of Asia Pacific Co., Ltd.
Regarding front Components:
You can buy
- Sony 4.5K
XS-GTX1620 : Speakers : Xplod™ Speakers / Subwoofer : Sony Middle East & Africa
- Kenwood S702P 6K (AMP is must)
Kenwood - KFC-S702P
- Alpine Type S 6.5K
Alpine Electronics of Asia Pacific Co., Ltd.
Rear Coaxials
Polkaudio DB691 8K
Polk Audio - db Series - Mobile / Marie Speakers
Alpine Type S 5K
Alpine Electronics of Asia Pacific Co., Ltd.
OR
Alpine Type R 7.5K
Alpine Electronics of Asia Pacific Co., Ltd.
According to your budget.
You should also considering a good 4 Channel AMP, as these high power front components and rear 6 X 9 can not perform at their full potential without an AMP.
Regards