My advice is don't bother with flares unless you are serious about it and you actually NEED them. Remember bolting them on is the easy bit, you have to cut the body up to allow clearance. If you aren't comfortable with cutting out at LEAST this much of your car, then don't bother.
If you ARE serious though, I'd stay away from Autokonexion unless you get their carbon stuff. Their fibreglassing is shocking. I've been down that road before, poor fit, poor quality, crack very easily and all round pretty nasty. You have two choices with AK, 30mm or 40mm flares. If you do decide to go with them, the 40mm flares have far better fit quality to the panel as they have little locator tabs that stick out midway down the flare and help them mate up to your stock body easier.
I sold my AK flares in favor of Jubiride flares. In my opinion, they are the best quality you will find and although they are expensive, you really get what you pay for. Don't settle for less if you have to look at it every day, the last thing you want is disappointment.
But going back to before, don't do this unless you need to. Is the car stock powered still? Do you need wider wheels and tyres? And if you do need wider tyres, do you need a wider track as well? My wheels are 15x8 -6 and with 205/50/15 tyres, there was no possibility of fitting them without massacring the body of my car.
My advaice with buying flares is to go directly to the manufacturer rather than through a shop. Ie: avoid rev9 like the plague. Either go through jubiride or autokonexion directly, or contact tetsuya garage or jesse streeter for better prices.
A few different companies you should look at:
http://www.jubiride.com/ - pricey but best quality and fit. They mated up perfect to my car with no modification etc
http://www.tuckin99.com/ - expensive as hell and not worth the trouble unless you want N2 flares
http://shop.autokonexion.com/ -wasn't impressed with their quality at all but I've heard great things about the 40mm flares and their carbon work
