and none of the rewiring / reprogramming that is needed from BOSE.
Thats the advantage of the Bose - dead easy, and a worthwhile sound enhancement. And cheap. And best of all, can keep a factory look to the HU. For those that way inclined, you can have Satnav on the display in instrument panel, which is far better than having to look down at stereo, and far superior to portable devices. And all controlled without lifting a finger from wheel.
I was under the impression that BOSE needed a seperate wiring loom, different speakers (you are going to have to change them anyway) and that Joe Public then had the inconvenience of having to get someone to activate the BOSE with a Tech2 - all extra costs ?
Keep the head unit, Satnav on the instrument panel and fingertip controls, but buy a decent small 4 channel amp with high level inputs (£100ish), new speakers all round (£100ish), and you could have absolutely stunning sounds, 100% original looks and still have enough change from a a couple of hundred quid for a bag of chips.
Agreed. But thats £200

Actually, as you know, just the amp can deliver better sounds from even shitty speakers - my old GTE I amped (only because I realised that the Kenwood I bought (cheap, due to having a contact) didn't have an amp, preouts only), and that sounded pretty reasonable even with Standard speakers. I did have to replace speakers in the end, as I was young and I mullered them

That stereo then whent in my Rover, Mrs TheBoy mullered a few speakers in that - but she just walked to the track and accidentally borrowed replacements every time! Then it ended up in her Dad's Rover.
That was a great setup, bearing in mind I got it in 1992, had the soft touch cassette buttons, 10 disc changer, and a pair of amps, and an IR remote. From the mid 90s, it only ever saw CDRs

, and was still working flawlessly 2yrs ago when her dad changed car...