Suspect, your VM doesnt work so I'll respond here (if no response Ill PM laterz)
Marth is definitely a formidable opponent, but is easier to get in on. He has issues that make him just as equally hard for me as a wario as much as against Meta Knight. Marth gets auto-grab release. Meta Knight gets transcendent aerial priority. Marth gets lots of range and better kill moves. Meta Knight has superior off-stage game. Marth has great frame-safe movements.
I think it's personally even for both matchups, but Marth excels better at neutrals than Meta Knight, while Meta excels at counterpicks. From the current metagame outlook, Warios think it's about the same level of difficulty only much more difficult than I think it is.
The highest level of play I've seen so far from Marth though has been from Akashi's and a Meta Knight user that seconds Marth (I think he's popular but hasn't been doing too well results wise, I can't remember his name, used to be a top MK anyways). We played at Dallas, I just barely beat him on Lylat in a seriously XD