there’s a boatload of multi-format writers out there now, you just have to decide how much you want to pay for one.
the sony drives are almost the “gold standard” of the writers out there right now- 4x on -R/+R, 2.4x on +RW, 2x on -RW, 8MB cache… unfortunately, you end up paying for the Sony name that comes on the unit more than anything else…which isn’t that bad of a thing.
the big questionmark with all the various drives are “what media is compatible with it?”. sure, they all say “4x +R/-R” , etc, but there’s typically a very limited list of branded media that they will claim that on. you’ll have to do some digging around if you want to find out if the drive will write at the speeds you want it to with the media you (want to) buy.
that being said, you’ll have to do that with ALL the drives out there, not just the Sony drive… but the Pioneer, the LG, the Optorite, the NEC, the Plextor, …
the Plextor denny mentioned is probably the first of the “3rd generation” multi-format writers that can really truly replace your CD-R/RW drive, as it can write to cd-r media at 40x…which is kind of even below the lowest generic cd-r/rw writers now… of course, you’ll pay a price… it IS a plextor… and it IS the first of the 8x +R writers (does 8x media even exist yet?) … but, it’s the big badass on the block now… for another couple weeks, at least…
… and a note to Denny: the pioneer multi-format has been shipping for a couple months now… the plextor drive just started shipping 2 weeks ago in limited quantities.
i personally own an Optorite (yeah, cheezy generic “name”) DD0203, and have had no real problems with it thus far- the only “problem” i’ve had has been finding out what 4x media i can use on it without buying some to try it first. :)