Custom Headunit

[cheechm]

Hi,

Need some help choosing / installing a custom headunit.

I want to get a touchscreen double din. Something like a Pioneer or an Alpine.

Primary functions:

Satnav
Playback from iPod
Handsfree (Bluetooth)

That is all the I need, and anything else is an added bonus. So I was wondering which make is best for Sat nav. I know it is advisable to get something like a Tom Tom, but in this case, I really don't think that I want one, as I would prefer to spend the money on the head unit. The sat nav is only if I get really really lost, as usually I prefer to read maps. I'm in London (UK) if that makes a difference by the way.

I'm looking for a new double din headunit, a good shallow sub woofer (that packs a punch but isn't extremley loud), new speakers for the two in the front doors, and all necessary fitting accesories/cabling such as ISO adapters etc...

Thats why I need to ask:

So what do I need?

As in everything! What do I need for the complete system.

In terms of price, I would like to keep it under £600 if possible?!

The Yaris I have is:

Yaris T3, 06 Reg, (MK2). Engine: on the left.

This is what the current stereo looks like:



The only problem I already see is: Is the stereo built into the dash on the top? As in: is it necessary to make some modifications to the dashboard (ie cut bits off) to fit a new hu?

Any guides would be a great help.

Many thanks,

Nick