I've owned both. The 4.8is is raw and sooo much fun to drive. The 20s help it corner on rails. But I too was prone to the suspension issues. Airbag leaks and master control failure. Luckily all was covered under warranty. Rotor failure was the final reason I traded it in for the E70 4.8i. It's almost as much fun to drive. Performance is comparable despite the added weight. But with that added weight you get a smoother ride, better nav system and updated technology. E70 should be a little more expensive but get a good CPO and you'll be happy
