LP to CD transfer question...what's best?

I wanna make absolutely fantastic cd's of my lp's and i'm well on my way but need some pointers. My turntable, phono preamp & cabling are all good. I have an M-audio 2496 card in my computer and i even set my tower on a homemade maple platform with brass spikes to drain the 'puters bad vibes. When i listen to the tunes in my monitoring headphones the detail is all there but when i burn master cd's at 4x the detail just isn't there. Plus, i use Mapleshade records Mikro Smooth on all my blanks which makes a tremendous difference. I'm thinking about ditching the PC altogether and using a standalone burner. And i hear using an A/D converter is a plus...are these even made anymore? ebay didn't have one suitable. any help is greatly appreciated.