Perfect Size Wheel?

Minicobra1

I'm trying to get there myself I've installed 15mm spacers on the front and rear, and it's looking a little better I eventually would like to go with wider rims, so this is going to help me determine the offset.
Here is pics with the spacers: 15mm Spacer installed (Rear)

Stock wheel specs for sport package:

Front 19x9 +47 245/40/19
Rear 19x10 +30 275/35/19

Here is a wheel offset calculator: Wheel Offset Calculator

I think this is definitely a matter of preference, but based on this info I think for me the perfect wheels would be.

Front: 19x9.5 +30 275/35/19
Rear: 19x11 +22 305/30/19

Option Rear:
19x10.5 +15 305/30/19

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