I setup my Project CYANide car with 31mm VTA tires front & rear, not so much because of looks, but because wider tires will put more rubber on the ground and corner better. For straight-line drag racing, thinner fronts might be better, but wider is usually better when it comes to cornering.
Spacers, thicker hexes might get your 26mm tires out further, but you might have to install longer arms, CVDs, modify your shock towers & shock lengths, turnbuckle & tie-rod lengths too.