I love WebOS and the Pre, but the OS itself needs some serious optimizations. Loading times could use improvement as well as multi-tasking. though, on the Pre Plus, the extra ram helps. More in the sense going from app to app is not so sluggish.
but the music app for example, takes a bit of time to read in my embedded album art. it's finicky, and quite annoying. So while it shares the Droid cpu, the Droid seems faster, likely because Android 2 is more mature. I have the Pre on Sprint, for reference.
But the Pre has the best size I think. I hate all the huge touchscreen smartphones.. feels like a brick, especially the Droid. But I'm a minority on this one. I would not mind the Eris form factor though.. with a snapdragon processor.
If you can wait, I'd see what Palm has to offer in the summer (they need to... or else they will slip too far, if they haven't already) and wait for the Nexus One/HTC Incredible/ or equivalent. If you absolutely need something tomorrow, Droid.