If it were me, I'd get the Atrix because it's narrower than the Optimus G. If your main complaint with the G is that you can't find a case you like, I'd say see if you can find a case for the Atrix that you like. Spec-wise the Optimus G is better, but that does not mean it is the better phone. In the end, it comes down to personal preference, so only you can say which one is the best. Get into the store and get your hands on a demo model (NOT one of those dummy phones) and see how it compares to your G.