I give you props for doing what you did. It will pay off don't worry. I wish my BF of 10 YEARS would think about doing something like that for us. Instead he has spent it all on his RX-8! Which in a way it's coo because that car now looks sooooo hawt, but anyways good luck with your engagement...
Better breathing YES. More risk of sucking Water YES, but here in Cali it doesn't rain much and if it ever did get bad I have a back up car to drive around in.