I've been running windows for years with no complaints. Lightroom works flawlessly. I am still considering the surface pro, and will likely go into Best Buy to check it out and if I like the feel, get it. Based on reviews I am likely to get the i7, 8GB, 256 GB hard drive.

I built my home system and it now has: AMD 8-core (4 Ghz per core), GT 430, and 8 GB RAM. Both Lightroom and photoshop can utilize all 8 cores on the AMD processor.