I don't think anyone here has the Acer, as I asked the same Q a while back and everyone basically said *breathes in* PLEXTOR!
That said, I remember Acer's 2x2x6 being well-reviewed when it came out, so they've made at least one good drive. Plus, 8MB's can't hurt.
I'd still go for the Plextor. They only make CD recorders, so they must be better at it than other, multi-faceted companies.