Hey i am in same boat... i have Manza and gone through many checks and let me tell you my findings -
1. Manza has inbuilt HU, front speakers and Parcel tray Oval shape speakers - > quality is just about OK for FM. no serious music or bass....big NO NO
2. Steering mounted audio control works only with current HU --> big problem when you think of replacing HU
3. HU panel is 2 DIN but inside its true 1DIN player only however you cannot install after market 2 DIN player due to shape of the console.
4. 2 DIN after market HU needs custom made frame which will cost you more and then only you will be able to install it.
5. current HU powers only 18w x4. even cheapest Pio HU gives you 50w x 4 --> current HU big problem if you just upgrade to quality speakers.
6. you need speaker upgrade + AMP as HU gives very less power so even if you install GTO series 90W RMS speakers HU cant drive them.
Possible solutions -
1. Keep current HU so you can have steering mounted controls + change existing to some decent speakers + add AMP (2/4 channel) + sound damping + wiring
2. Keep current HU so you can have steering mounted controls + change existing to some decent speakers + add AMP (4.1 channel) + Sub + sound damping + wiring
3. Custom frame + aftermarket HU + speakers + AMP(2/4 channel) + sound damping + wiring
4. Custom frame + aftermarket HU + speakers + AMP (4.1 channel)+ Sub + sound damping + wiring
hope this helps. decide and let me know your decision. i am waiting for my friends to come from US so i can get good 4.1 AMP for less then 6k
