I'm a doctor married to another doctor. We've been together since before medical school, went through together, and are now in residency. It's working fine for us. You do have to be creative to carve out quality time together, but I'm not sure it's so different from many other couples with two professionals. Remember there are plenty of other careers that are as, if not more, demanding than being a physician. I think of many of my friends in the business world who also put in 60+ hr/weeks (although that doesn't even approach the 125 hr week a fellow resident recently put in, but I'm generalizing here). Firefighters often work 30+ hr shifts (it's not just doctor's who do this). And there are plenty of couples out there dealing with the stress of working different shifts - think a nurse working the night shift married to a doctor. So, the grass is not always greener. I say marry someone you love who also loves you, someone with whom you have plenty in common, someone who shares your values, someone you see yourself growing old with. Don't choose your life partner based on their career.
We don't have kids yet, so I can't speak from personal experience there. But the majority of kids now grow up in homes with both parents working or in a single parent situation where that parent is (hopefully) working. I am the product of two working parents and was in (gasp!!) daycare since I was 4 (had a non-live-in nanny up until 4) and I turned out fine. Again, it's not just a two doctor couple who will struggle with raising children - that would be nearly all couples.
And, while I have no comparison, since I have only been with my husband throughout this whole process, I do think it helps a lot that we understand what each other is going through. I understand when my husband doesn't call me during an entire call night, whereas I here from many fellow residents that their spouses are constantly nagging them about why they can't call like every 2 hours. My husband understands when I am too tired to cook dinner.
There's no denying it's tough at times, I just don't know that it would be that much better if I were married to a lawyer, an engineer, or a financial analyst. Plus none of those people would be the man I fell in love with and who makes my laugh everyday - there's a lot to be said for that.
You roll with the punches and make sure to keep the lines of communication open. You are both under alot of stress and there are going to be rough times, but hopefully you will keep to the commitment of the relationship. 
