I bought one a month ago and have been quite impressed with it although for these targets you can probably get away with a cheaper webcam based imager (eg a Toucam, LPI or Neximage). I started with a Neximage and have had a lot of fun with this but it's maximum exposure is less than a second so it won't pick up faint objects.
I reckon these objects will be bright enough to get a good result in a small scope. The DSI can do longer exposures so is good for fainter objects although it has settings for planets in the capture software but I haven't tried it for this purpose yet.
A lot of people don't like the DSI and the software does take a bit of getting used to - you'll find lots of posts in this forum on it!
Peter
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