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Personally, I prefer traditional, so I would recommend a dark suit or tuxedo, for you, with a white shirt and a matching, elegant tie of your choice. If your fiancee's wedding gown is white or ivory and in a traditional style, this will look great together.
I LOVE your choice of the eternity bridge; very romantic and meaningful for you!
As far as the vows, you can include your 'main' beliefs (don't make it too long), but incorporate your love for the woman you are marrying and want to spend eternity with, in relation to those beliefs. If it is your belief that "the universe is purposed, by God, for a specific reason", make part of that reason how/why you two met, fell in love and are now marrying, as part of God's plan for you both. Expound upon the reasons why you love her and how you have become a better man since being with her and why she is the one with whom you want to spend eternity.
I wish you much good luck and congratulations, and hope your wedding will be beautiful!
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