Peppe
·Truth is, all Speedmasters really only wear as large as their bezels. The Pro case is 42mm but the bezel is closer to 39-40. There's not much visual difference, size-wise, between a vintage straight-lug and a Pro - and even the modern Dark Sides wear much smaller than their 44mm size. My advice would be to go try it on next to a regular Pro and see which one speaks to you more.
Worth pointing out however is that most watches looks a bit neater with a strap rather than a bracelet.