hiya liz,
I am afraid that when it comes to taking hires planetary shots as you want to do the toucam is probably the easiest way to do it as well as teh cheapest... a DSLR just wont do the job for you when it comes to planets at all. I havne used the astro specific cameras like the dmk but i am asuming they too are more complex than the humble toucam to use...
I guess if you get a DSLR you could take long exposure shots of DSOs in the bulb setting that pretty much lets kyou open the shutter as long as you like, and you could use it for day to day picture taking too... but dont be fooled into thinking that DSO pics are easy to take either, trackig needs to be prefect, the exposure(s) not too long or short and multiple images of different exposure lengths need be stacked and then processed in picture editor... etc.
best of luck in whatever you come up with
