It's very interesting how you came to the position you currently hold on this issue. My journey was sort of a "mirror image."
I was saved at the age of seven. The church I was raised in took a very hostile view of evolution, and I grew up to be a very staunch 6-day creationist. Not only did I learn all the reasons why evolution violated God's word, I was familiar with all the scientific evidence against evolution. In essence, my background was antithetical to your former evolutionist background. For many years (a couple decades) I never really examined the evidence for evolution, nor did I research any Biblical explanations that might have provided an alternative to my long-held and seldom-questioned opinions. Have recently done so, however, I have been equally amazed at what I have found.
At this point in my life, I can say in all honesty that, like you, I have researched both sides (or rather, ALL sides) of this issue. The fact of the matter is that, as an ex-creationist, if I were to harbor any biases whatsoever, they would actually tend towards the creationist side. I have simply tried to be as objective as possible in my research, with the inerrancy of the Bible as my foundation. In fact, I am sure that we have both examined many of the same resources, and somehow have come to reach different conclusions. And that is just fine, because in the end, we are both just sinners saved by grace.
As far as the sun being created after the earth, Scofield (again) says the following:
Neither here [Gen 1:3] nor in vv. 14-18 is an original creative act implied. A different word is used. The sense is "made to appear, made visible." The sun and moon were created "in the beginning." The light came from the sun, of course, but the vapor diffused the light. Later [on day 4] the sun appeared in an unclouded sky.
As I said in my last post, I take Scofield's notes (as well as any other Bible commentator's to include Gleason Archer) with a grain of salt. I'm not really sure I buy this explanation, but I'm willing to consider the possibility. I believe there are other more plausible explanations, but it's getting late and my brain is refusing to function at a level that would allow me to organize them in any cogent manner. You've probably already heard them anyway.
BTW, I don't use the NASB (I don't even think I own a copy). In my daily readings, I normally use the New King James translation (the Experiencing God Bible). The Scofield Reference Bible I use mainly for reference (as the name suggests!).
Finally, I hesitate to speak for other people, but Lewis Wildermuth has a story very similar to mine, which he has posted on a different thread.