Thanks sandals, yes I want to stick to a budget, but not too cheap. I’m not looking at a £7-800 system, but something sensible. Secondhand isn’t really what I’m after, would like new if poss. Nothing too loud, but that nice distinct burble. Had a quick look on the cobra website and a non resonated cat back was under £400, but would that be a good choice/ not too loud/ give the nice burble?