Damn that sucks on the engines. N55 is absolute garbage IMO but the n55 guys on the forum still vehemently argue that there are no rod bearing issues with them lol. I owned a dream spec N55 for a while and could not sell that thing fast enough, hated the N55.
N54 IMO is a vastly better engine than N55 but can't go wrong with an NA 6mt e92. They don't make them like they used to