For the Puget Sound, I would be surprised if you were warm in any wetsuit. You can certainly be not-hypothermic, but you won't be warm. You can be warm in a drysuit.
Another thing to consider is comfort out of the water. In the winter here, it's really cold during surface intervals in a wetsuit. It absolutely sucks getting out of a thick wetsuit when it's still cold outside (it's not even much fun in the summer). In a drysuit, you get out and not only are you dry, you're in pajamas.
That being said, I dive a 7mm pinnacle wetsuit and I find that it's possible to do a ~50 minute dive followed by a 20-30 minute dive in the winter. The second dive was called because I was worried about hypothermia - 45 degree water is not a joke. Needless to say I only did this once last year.
If you can't and won't be able to get a drysuit, I recommend pinnacle, but I don't have experience with O'Neal. Personally, I would save for a drysuit - I am saving for a drysuit.
Another option is to get a cheap wetsuit (a farmer john can be as cheap as $150), dive it this summer, and save for a drysuit by winter. Cheers!