I've had an SII for over a year now. I've been happy with it, especially how I used to switch phones every few months. With "quad-core" being thrown around a lot, I kinda want a phone with it. Is the Nexus 4 a big jump from the T-Mobile SII? I'm looking for a cheap upgrade, trying to buy w/o a contract. I really like the note 2, but it's pretty expensive w/o a contract. Will the Nexus 4's 2GB of ram and quad core keep it zippy for years to come? Is it really worth the upgrade? I'd be putting in around ~$130 more after I sell my SII. Thanks.