Well I know I dont want a DOB due to portability issues, i understand there not that bad to move, but I cant image wanting to lug that around with me.
There are different parts of the "lug around with me" problem. With a dob like the ones mentioned, you move the base to where you want to observe, you go get the OTA and plunk it down into the base, you attach a couple of springs, and you start observing. If you get the object locator, you also do a two-star alignment very similar to what you'd do with either of the NexStar mounts, then you start observing. Any newtonian (such as your previous DS2114) also requires periodic collimation.
With the 150XLT, you put the tripod in place, then you mount the CG-4 to it, then you attach the counterweight, then you attach the OTA, then you swing the OTA and mount around both axes to ensure you've balanced it right, then you check your polar alignment, and then you start observing. The 150XLT may be light enough that you can move it all at one time, but that's a bit risky. In any case, you'll be doing a polar alignment -- at least a casual one -- each time you set up the mount.
With the NexStar mounts, you set up the tripod, attach the mount/scope combination, do a rough North alignment, do a two-star alignment, and start observing.
You can compare the relative weights of the various pieces and decide which is "easiest" overall.
I may go with the 5SE and Hope I am happy with it. As I cant get it out of my head that a "larger: image of Saturn is for sure what I want. And If I can see 2 dozen or so interesting DSO's then I will be happy.
The larger image of Saturn (or other objects) that you see comes as a result of focal length. Just for comparison, here are the focal lengths:
- DS 2114 = 1,000mm
- 150XLT = 750mm
- NexStar 5SE = 1,250mm
- NexSTar 6SE = 1,500mm
- Orion XT8 = 1,200mm
- Orion XT10 = 1,200mm
The difference in the views of Saturn through the 5SE and the Orions will be primarily in brighness and amount of detail. They will be, effectively, the same size with the same eyepiece. Resolution (appearance of detail) is primarily a matter of aperture and contrast of the optical system.
Will the 5SE have the power to show me M51, or M81?
It will not have the light-gathering power to give you a "good" view. You can offset that somewhat by traveling to a truly dark-sky site. Doing so is like adding another inch or two to your aperture. The same is true for M81: you want a clear, dark sky, and as much aperture as you can bring to bear.
Again, a lot depends on your expectations. Any of the above scopes will give you a better view of such objects than your current scope, but (again, relative to a DS2114):
- 150XLT will be lower-magnification (not really a problem here) and a little brighter
- NexStar 5SE will be very nearly the same, perhaps a tiny bit brighter
- NexStar 6SE will be a bit larger and a bit brighter
- Orion XT8 will be a little larger and a good deal brighter, and you'll be able to make out the basic shape (although it will still be a grayish fuzzy object)
- Orion XT10 will be obviously brighter and will show some detail to the shape, although not much detail overall.
As far as Ep are concerned I had in mind, the Celestron X-cel 5mm, and X-cel 2x-barlow. they are supposed to be great for planetary viewing. I hope also decent for DSO.
You won't want to use your 2X barlow with any of the supplied eyepieces for DSOs, in general. A few may benefit. You want an eyepiece/barlow combination that avoids going over about 150X for most DSOs within reach of the above scopes. You want to avoid a combination that goes over about 300X for any object most of the time (since most of the time atmospheric seeing effects won't permit sharp views above that power).
But, for lunar and planetary observing, you can pair the 2X barlow with the eyepieces supplied with the above scopes, and you can use the 5mm eyepiece without the barlow.