New battery advice, please

[BoxClever]

Thanks a lot, Zeb... and others. I actually bought a Yuasa one from GSF at £100 and was the highest power available in the 278mm size. Car fires up much better and I've cleared all the codes and its running better.

But....

... pulling out of GSF and I hear an all too familiar scraping coming from behind one of the wheels on the passenger side. How many bloody BMWs have I had to fix rusting backing plates on??? Does my bloody head in. And this one is on the rear and now the handbrake isn't working... arghhhh!! So I'm dropping the car off at my local good guy indie tomorrow and keeping my 2.2 insured until I get the 3.0 back. GODDAMMIT!!!