I've gotta be honest, based on the pics there, in all black... they look like someone absconded with the hubcaps that should be on there. I'm assuming they'd have more gloss than the photochopped preview, which would make the two tone look fairly good, but in the long run, my vote for looks still goes for what you have already, and my vote for functionality goes against the added weight too. Drag wheels don't exist for looks, that's what the wheels getting you to/from the track are for, anyhow!
<insert 'my opinion' disclaimer here>