The only options on the G6ET is Sat Nav, 19 inch alloys and (I think) the Safety Pack (someone correct me here if I'm wrong) which is adjustable peddles or something. No LSD, no, but I honestly don't give a rats, only noticeable difference is the G6ET will smoke only one wheel at a time, rather than both LOL!!! No noticeable dramas with the brakes (14,000ks so far) although they aren't designed to stop a 1,600kg odd car from 200km/h, 10 times in a row. They are adequate for everyday driving. I don't think any one else on here has had major problems with brake shudder, at least not like the BF's had. Mate, they are one classy, powerful car and I have had a few very minor issues (blue tooth, small oil seep from timing cover etc) but nothing really major and all the tiny issues were fixed at my last service. I still love driving it every day and would venture to say it is one of the best cars I have ever owned (that's after owning 2 faultless Subaru Liberty's) and would say, MATE JUST DO IT!!!!! (you know you want it )