I own a 4416
Hi...
I own a 4416 and recently purchased the card to add the 8 analog inputs. I got this card as a matter of convenience and not really necessity, because (being a basically remedial person) it simplifies my signal routing. Having 16 tracks but only 8 analog inputs means switching things around frequently. But now with 16 analog inputs and 16 tracks I can route each input to its own track and forget about it. To further simplify my setup I have created templates (yamaha calls them "scenes" in the 4416) so when I record a new song on the 4416 I use the same channel each time for each specific instrument. By setting up a scene which can be saved and then recalled very easily, each channel can have its own EQ settings, dynamics, effects, etc all ready to go when I load the template. My plans for the additional analog card is that it will allow me to leave my drum machine connected right in to inputs 9 thru 16. One drawback to the added card is that there are no preamps on each input, so each input is line level only and not switchable between mic and line level as is the case on inputs 1 thru 8. I LOVE my 4416 and think you probably would love one too. Having owned it for 5 months, knowing what it can do, and considering the cost compared to the tascam, the 4416 is a better choice.
Good Luck !!!