if your just after a loud DV, then you aint gonna get any better than the turbo xs - type h (silver one with the trumpet).i've had loads of different DV's on the car and they don't even come close.
but if your wanting something not too loud but fairly reliable, then i'd recommend the new bailey with trumpet.it's still loud but more than that, it's a twin piston jobbie so ideal if your still running a standard afm.
the baileys are around £90, where as the xs one, well it's still a tad expensive (£150 - £200+).
i fitted mine using the current bailey fitting kit and although a little tight, fitted no probs.if you have a front mount, you could always weld it on the intake pipe i suppose.
regards
kenny