GTi6 exhaust suggestions

[Dum-Dum]

I've got a sportex back box and standard center section with the baffles blown out and its nice most of the time, infact not loud enough if anything top end but like most GTi6 systems it's annoying on the motorway. Its OK with the stereo up but if you want to have a conversation its too loud. Annoyingly its worst 65-80mph but this is the worst on all the GTi's.

I am turning into a right grumpy old man though.