The outfit looks good, your tie could come a wee bit lower, but thats not really a big deal, the belt with the Argyle is fine, the only problem with a belt is when it is worn with a vest. The one thing that I was thinking is that with that jacket it might be an idea to wear a dress sporran as to my mind anyway a Black Argyle is sort of formal, not as much as a Prince Charlie, but very close, just my 2 cents.