Honda civic stereo upgrade. Will this work?

I have a 60 watt factory CD/stereo in my Honda Civic. I want to add a 500 watt amp to the factory stereo and just swap out the factory speakers with the same size speakers but better quality ones.

More importantly, i want to add a cable to play my IPhone music and Pandora and XM app through my car speakers.

Anything tips and info/input will be great.

Thanks!

PS- I want to keep my factory CD player so if a robber looks into my car he will not see anything worth stealing.

Sounds pointless if you're keeping the stock head unit but it depends on what year your Civic is and/or what amps you buy. I would just buy a decent aftermarket head unit/radio, it'll be so much easier if you want to use amps. Plus, aftermarket head units usually sound 5 times better than the stock. If you have a newer Civic, you to dismantle half of the dash just to unbolt the radio. Thieves don't want a radio thats gonna take a long time to steal and you'll have to bolt the aftermarket one in too. If you have a tv in there, it MIGHT be worth the extra time though.

The stock radio w/external amp and new speakers is a common upgrade and will improve your sound significantly. You will either need an amp with hi/speaker level inputs or a line output converter.
The aux in feature may be a problem. I'm not sure what your options would be there.
You may want to look for a civic specific forum and see what they've come up with for your year/model.