Welcome back, crazycanuck- wondered where you ran off to. Don't be such a stranger, alright?

Congrats on your first mary!!

There are lots of options. These are the two most common ones you'll see. I have tried both. I currently have the Xtenex, but have used the lock laces. The Xtenex are nice because you can make certain parts of the shoe tighter than others (I like the toe box loose, the midfoot tight and the top loose)- can't do that with the lock laces. I use them for tris, but have them on my shoes all the time. I've run marathons, 5K's and ultras with them and have had no issues. Personally I love them.
My hubs has the lock laces and loves them as much as I love my Xtenex. Give them a try and see what you think.