recently i ordered a couple of audix 15 fussion mics to use them as overheads for drum recording. the thing its that there seem to be a confusion with the order and they sent me a couple of i5´s (they mistook the 1 for i) so i did research on the mic and it seems to be compared to the sm57. so my question is. am i going to get a very undesired sound if i used them as overheads? is there any kind of inconvienience? are they better than the 57s for micing really heavy distorded guitars? would aprecciate your comments to see if i return them or not.