timing

Here I am with yet another facile set of questions that are probably all too obvious to everyone except those in a persistent vegetative state. So here goes... please feel free to tell me to piss off and use Google at any stage, but Google doesn't seem to answer my specific question at the...

Looking to buy something to play along with. What do people think about things like the Boss DB-90 which looks prett good (youtube vid reviews and how to's etc). Or should I look at a good drum machine. I like the ease of a metronome to just start with but like the idea of a drum machine to...