You can get the warm white CFL bulbs (2700 K temp) all over the place. I got mine at Walmart for something like $6 for 3. Don't use incandescents, they are nearly worthless for light spectrum that the plant can use and they generate way too much heat. Use as many CFLs as you can, maybe going for the 42w or higher if you can. You'll only want to use the 2700 K warm ones for flowering tho...for now just use your 6500 K.

The cabinet sounds great. Does the fan ventilate it enough for you? Have you done any dry runs with the lights on for all day to check?

I'll be looking forward to watching your grow!