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Tbh I kinda agree on not going overboard on a suit you may not fit back into.
Unless you're a really odd shape, go for an OTP suit + tailor. You can chose the OTP suit based on your budget.
On shoes I went to C&J on Jerman St. Great service. Obviously depends on your budget, but they're a good balance of quality without getting crazy on price. Also the styles tend to be more elegant than some others. If it's a country theme and you're wearing tweed then have a look at Trickers, otherwise ignore.
Was a bit tongue in cheek, of course you want to feel/look good for your wedding.