as a guy, I say living together beforehand isn't good. I heard a story on NPR (National Public Radio) that did a survey that said most people who cohabitated were not as happy with marriage.
Also, as a guy, your con point 2 is really a big issue. A guy would think, well, I'm getting all the conveniences of marriage now, and on top of that, it's not COMMITAL! why would he want to marry you and spend all that money on the ring and etc? Also, there would be nothing new after the wedding, just the same old thing.
Furthermore, for guys, it's easier to walk away at an older age. say you live together for 5 years. He's 29, and you're 28. You feel your biological clock ticking, but he's still not interest in marriage and kids. You'll probably end up pushing him a bit, and he might say, hey, no, I just want the other benefits, and refuse, and even maybe walk away. Now, you're older, and you have to start over, and you compete against younger girls, and it's harder to find another man. Say you move in with another guy for 3 more years... you see where this is going.
Also, as far as trying to get to know the other person, see how he treats his family members. I've heard, and this is true, b/c I see me doing that w/ my wife at times, you end up treating your spouse like your original family, particularly mother or sister. If he's disrespectful of them, and not caring, don't expect him to be all loving just to you. It's only romance. Once the romance wears off, you'll be treated like how he treated others.
I hope this helps. But good luck in your relationship. Best wishes. But really, living together, men like it b/c they get all the benefits on the cheap. Don't cheapen yourself like that, and I hope your man is dignified enough and respectful enough to stay with you even if you decide not to live together.