Opi's are great. Super lightweight and lock open. However, the OP didnt say if he was looking for a one handed opener or whether or not a locking mechanism is important. I would consider the importance of these features and also find out how important a pocket clip is and use that info to narrow down your choices. Opi's dont open one handed, but that crkt pazoda does it all.
You can open an Opinel one handed, I do it all the time. Pinch the blade, then push the handle open on your leg/table/whatever is handy. Catch the handle, and slide the lock into place with your thumb.
I use to be able to roll a smoke with one hand too, once upon a time.