to the op :
First : Sonar is by far the most completly bundled daw around , you don't need plugin , but my studnet with limited budget are just still smilling for what they got for 399 !!
Second : you like X1 , don't fell X2 (my case here for just stability concern) , wait and get X2C or X3 , i usually upade every 2 release
3er: the amount of enhancement you have in X2 versus X1 is WAY more than LE plugins ....
Just the new automation layout , screenset optimistaion, and FX hcain in the PC (understand here than i have preset of SSL consoles , neve ect ...with my VCC and it put all my console VCC ssl in one click ...Ect ) ect .....is some really noticeable ...
4th : Cubase : are you serious ? a daw that just discovered icons this year ? still doesn't propose FX by clip ? , a daw that did a "wanabee" prochannel that make me still smile when i see it ?
Sonar is by far the most "active" daw when it come to features , studio one and reaper are also on that politic ...you choose cubase it's like choosing the most concervative daw on the planet (like PT) ....