I'll have to disagree with your opinion. Until N551 is priced then we'll know if G551 is truly worth its price. Or alternatively, you could refer to how G56JR and N56JR was priced based on current Product Guide.
Depends which design suits ur taste better.
That would depends on the default power button setting. And The power button is way up beyond ur Num Lock key, how far would u reach there when ur typing?

Di Malaysia, Asus ROG G551 ini boleh didapati bermula hari ini, dimana model G551JM-DM052H yang hadir dengan Core i7, 4GB DDR, dan GeForce GTX860M (2GB) dijual pada harga RM3499. Model G551JM-DM053H pula akan dijual pada penghujung Oktober ini dengan Core i7, 8GB DDR dan GeForce GTX860M (4GB) pada harga RM4099.