Hi Mystikal .... I have owned and used both the 10" GSO dob from Andrew's and the ETX-70. I can tell you there is no comparison whatsoever between the views. The much larger light gathering ability of the 10" reflector, plus the fact that is has a focal length of 1250mm compared to only 350mm for the ETX-70 means that you not only get everything much brighter and better defined in the 10" but you get more magnification as well.
Quick lesson : telescope focal length divided by eyepiece focal length = magnification.
Both scopes came with a 9mmm ep so I'll use that example.
The 10" gives a magnification of 1250/9 = 139x magnification (approx)
The ETX70 gives 350/9 = 39x approx.
Also, the 10" has approximately 47,000 mm2 of photon gathering capability (allowing for loss due to obstruction by secondary mirror) compared to roughly 3850 for the ETX. You would gather more than 12 times the amount of light in the dob than in the Meade.
Why did I own both? Several reasons, but if you still have the ETX then get a green laser pointer and rig a little bracket so you can attach it to the ETX and have it pointing exactly where the ETX is looking. Then use the ETX goto function as a comparitively inexpensive pushto guide for the bigger scope: let the ETX find your desired target, follow the beam with the 10" and there you have it.
Of course an Argo Navis guidance computer for the reflector is MUCH better ... but if you still have the ETX that's a cheap way to go.
Have fun, enjoy the free spectacle that nature provides.
Steve