Willie, i have no doubt that the CS300 will be an awesome aircraft, but this thread is about a "new airline" that is basing its fleet strategy on a new aircraft that isn't expected to enter service before 2015.
Read this today, it appears that QR are following the tried and trusted method of starting an airline......
Al Maha would be a full-service carrier and have a mix of single- and twin-aisle aircraft, diverted from the parent airline’s outstanding orders from Boeing and Airbus. However, the new airline’s initial batch of around 10 aircraft would be leased, to allow rapid service entry.
Al-Maha will have about 25 aircraft in service before Saudi Gulf gets their 1st aircraft, they will then be forced to play catch-up.