Hi Randall,
As Davo has pointed out above, "I love ken's 12" dob for views of galaxies and the extra detail on planets". At last Camp Janoskiss took over my 12" (with permission) and gasped and ooh-aah'd at the difference a 12" makes.
And 2" is a LOT more light! There is a method of working out the percentage increase. It's not a simple matter of 2" more. It is somewhere in the vicinity of 30% more (hopefully someone knows the equation and can tell us all).
There is still (reportedly) a noticable difference in medium light pollution and a HUGE difference in Dark skies. As for what Doug has said just above, in heavy light pollution there won't be much of a difference.
But in moderate to Dark skies the 12" brings out the very faint fuzzies!
Compare the difference between the 8" and the 10" here:
http://www.iceinspace.com.au/forum/s...ead.php?t=9807
Then just imagine increasing that quality again by another leap in whatever percentage someone will work out for us.
But if you need to transport it on a regular basis, I suggest going here to take some measurements. All the dimensions are listed, just scroll down to the 12" model:
http://www.telescope-service.com/dob...iansstart.html