Pioneer DEH-P7750MP or Alpine CDA-9830?

[Boy Torotot]

My current Clarion HU has no MP3-playback capability, so i'm chosing between these two as replacement. DEH-P7750MP is around P13K and CDA-9830 is around P14K...depending on the shop, but basically di sila nagkakalayo ng presyo. I'm just going to replace my headunit, using stock speakers. In the future i plan on getting a good amp and a sub, and upgrade the stock speakers, for SQL setup. So it is important that the HU is ready to take on my future upgrades.

I really need more input on their differences(from your experiences), aside from the voltage output(2v vs 4v), i-pod compatibility, power output, displays(OEL, etc). Which is quicker reading MP3s & CDRW? Parts/service availability? And any other small details you don't usually see from the brochures but rather learn/experience through actual usage.

Also, if you think there are better choices besides the two, in that price range(2nd-hand/slightly used included), please let me know as well.

Many thanks!