Unfortunately, the CFL's do not displace the light at the proper 'angle', or rather, the proper kelvin temp.

Realizing heat was an issue, you made the proper choice, to stay with CFL's. However, you should consider:

Using the big 125W CFL @ 2700K

That would be sweeeeeeet.

Or, add some reg. incandescents in there....they need the right red light to both flower properly and change hormones internally that affect potency.

Some strains, even bagweed thats awesome, need the red waves. Since you;re gonna grow, give those lights a try.

Say that reminds me....I never even have seen a pic of your plants.

Cough them up.