Having a Labelflash drive myself (NEC ND-4551A), I personally don't think it's that good. I prefer LightScribe.
Although the Pioneer crossflash you speak of will also enable DVD-RAM writing (I believe), which is a plus IMO
Not sure about what can be done with the latest Optiarcs I'm afraid. So if you're definitely looking to crossflash, the Pioneer probably is your best option.