I am 5'2" and I have 2 Surly bikes, a Pacer road bike and the Long Haul Trucker touring bike. Both of mine are 42cm size. The Pacer has 700c wheels and the LHT has 26" wheels. Both of them have a 70cm standover and a 50cm effTT.

I have looked closely at the Crosscheck and I'd love to have one but the 42cm model has a 73cm standover which is way too tall for me! Crosschecks run big, possibly due to all the extra tire clearance they build into them.