Unfortunately, I do not have any soundclips, but you can find quite a few online. I am running MPE + EL Resonated + HFC. IMO, I think this is the perfect combination for our cars. It is quite loud when you step on it but can be tame as well if you drive normally. I couldn't be happier. As for bolting it up, you do need to chop a portion of the MPE midpipe. Luckily, I bought the MPE + AA EL off a forum member where the MPE was already ready to bolt up to it.
Here are some clips I saw that made me pull the trigger:
The last video below is probably the closest to my setup (MPE + Resonated EL + stock downpipe)