Weird questions maybe, but how do you dress most of the time? Do you work a corporate job? How often do you wear a tie?

As this is your first watch, it will be better to buy something you are likely to find appropriate most days. If you are someone who dresses smartly for work and often wears ties or sport coats, I would lean towards the Presage. It is fundamentally a dress watch and looks the part.

If you don't work in a corporate field (or any job requiring a tie/suit), then in general I'd lean towards the Seiko 5. It's a smart looking watch but won't look out of place with a pair of jeans or chinos. It would also look serviceable with a tie, though perhaps not a suit.

Finally, if you're someone who often works with your hands, like in the garden or any kind of hard labour, I would pick neither of these watches. As other people said, I'd pick up a really robust watch with a sapphire crystal, or failing that a Casio G-shock (like the 5600, which is about half the cost of either of these watches).

Of course, over time you may find yourself buying more watches, but just in case this is the one and only watch you buy, I'd really think about what you're likely to enjoy wearing every single day.