If you go to the project properties in Construct 2 by going through the project pane, there will be an option called "Sampling" - setting this to "Point" will prevent scaled/rotated objects from blurring.
Now that's out of the way, I would recommend Construct 2 for something like what you're shooting for, or most projects, really. Compared to Classic it's more stable, gets updated far more often, and is very nearly as capable so long as you're not interested in more advanced graphical functions like mesh deformation and pixel shaders.
The fact that C2 utilizes HTML5 is really the icing on the cake, allowing you to distribute your games to a much wider audience. Classic requires the user to have DirectX updates that do not ship with Windows, and this is a point of confusion that just poses another barrier to entry.
But really, if you want a shorter answer, Construct 2 is continuing to evolve while Classic is essentially dead -- not trying to discredit Classic, but it has some issues.
Of course, Classic is the only version with my MagiCam plugin that you might find useful...linkman20042012-02-01 01:44:50