Best Lens Correction for A55+SAL18250?

I just ordered the A55 + 18-250mm combo from Adorama.  ($850 -- seems like a good deal since it's a $650 lens, but too late now in either case.)

The biggest issue with me is that the A55 doesn't have in-camera Lens Correction (for distortion and vignetting).

I already have Photoshop Lightroom 3.6 and Photoshop CS6.  I'd be willing to spend a bit for a really good solution.  For example, I can upgrade Lightroom or buy DxO Optics Pro.  Obviously, I'd prefer a free solution.

Any suggestions?