No reason. Schott makes a nice product. Eastman and Aero definitely make a nicer product, but it's like telling someone to buy really expensive Japanese jeans - it may be worth it to you, or it may not be. Just depends on your personal preferences/comfort with different pricepoints. I personally think that Schott is a great value, and actually, of all the "bigger" American companies, do extremely well with more contemporary fits.
All of the above and they are easy to deal with for size exchanges since you'll be buying off the rack. Schott's build quality is very good. You'll only notice the difference if you start comparing the leather itself to the high $ jackets.