If it would be your only Mac for the next few years, I'd go portable.
I currently only have the one current Mac, a MacBook Pro, (other being an old LCIII running System 7 and hardly usable). My next purchase however will definitely be an iMac, 24". Most of the time I sit at my desk with the 15" MBP, so the iMac would take over duties on that front, but I occasionally take it into other rooms and away with me for the weekend/week on holiday and would continue to do this.
If I were to make the decision again, I would still choose the MBP. I considered the iMac briefly then went from PowerBook to iBook to PowerBook and eventually hung on until the MBP. Glad I didn't get an iBook or hang out for its replacement MB. Not really regretted it, but now I need to fill that desktop void with something a little more powerful and with a bigger screen. I'd always be looking at portables and thinking about the flexibility I'd be getting from them.
I currently only have the one current Mac, a MacBook Pro, (other being an old LCIII running System 7 and hardly usable). My next purchase however will definitely be an iMac, 24". Most of the time I sit at my desk with the 15" MBP, so the iMac would take over duties on that front, but I occasionally take it into other rooms and away with me for the weekend/week on holiday and would continue to do this.
If I were to make the decision again, I would still choose the MBP. I considered the iMac briefly then went from PowerBook to iBook to PowerBook and eventually hung on until the MBP. Glad I didn't get an iBook or hang out for its replacement MB. Not really regretted it, but now I need to fill that desktop void with something a little more powerful and with a bigger screen. I'd always be looking at portables and thinking about the flexibility I'd be getting from them.