Muffler delete is an annoying type of loud really. Makes it sound like a fart can. Something that isn't too loud is Remus, did a lot of looking before I found my powersound and i'm content with it. It isn't too loud or too quiet it's just right especially with a resonator delete. But I get some drone do to the resonator delete which I'm fine with. But I wouldn't recommend you delete your resonator since you said your gf won't be pleased but hey it's your car!!! hahah my gf thought it sounded a lot better then before though. And the longer you have the muffler, the louder it gets. So this will suit you but I suggest finding a used one since I don't think it's worth $900 but that's just me, i'm a stingy guy lol i got mine for 200 but if 900 is too much the cheap way out is muffler delete but I highly DO NOT recommend it. It WILL annoy you! If anything go with a Magnaflow.
| KW V1 | LCI rear | 359m Style | Ventus V12 | AA Stage 2 | Gruppe M | Remus | Mtech Rear | M3 Front |