Now I REALLY REALLY need your help cause the HU has arrived

I would be getting the installation done over this weekend. I need to go shopping for that.
What I already have,
- HU : AVH-P4000DVD
- Blaunkpunt 2 front door speakers (Do not remember the model)
- 2 Pioneer tweeters, front (Do not remember the model)
- 2 Pioneer Speakers in the rear parcel tray, TS-2150
What I need to shop for,
- Cables for the whole setup within 2K-3K
- Subwoofer within 8K
- Amp for the Sub within 5K-8K
- Amp for the rest of the speakers within 8K
Help on this would be Highly appreciated. I do not want to regret later for not taking a "second" opinion over here.