I guess you want the images to test the quality of this setup??
Problem is you didn't take the images. Your quality is dependant upon the exposures you take and the post processing methods you use. Stitching is irrelevant. Panoweaver will do the job provided you have a properly setup rotator.
I have seen totally botched panos from every kind of setup. Usually due to poor photographic techinque and either no photoshop work or doing it the wrong way.
I use this setup (D70s+Nikkor 10.5mm). Here is an example of what "I" can do. I have seen work better than this by others more magical than me.......LOL
This is a similar thread but it shows what can be done with an experienced photographer behind the lens. See the very last post where Smooth shows an example. He is using a coolpix 5000(5mp camera) with a Nikkor FC-E8 lens.
The Nikkor 10.5mm is an awsome lens. It produces better qualtiy "optically" than the quite execellant Sigma 8mm. However there is a difference in how this is accomplished due to the different optical qualities of both lenses....drum vs full frame fisheye. Its 6+T+B vs 4 drum.
The sigma 8mm is easier to shoot becasue it requires only 4 images and you get a full spherical with no issues with the top and bottom. The Nikkor requires 6 min plus the top and bottom if you want a total 360. However you will notice there is no top and bottom in my example and that is because of time vs price issues in lower priced real estate tours. I do include top and bottom on higher priced jobs such as vacation rental etc.
If you want to see what can be done with almost any setup take a look at the world wide pano event. This showcases pano photographers from around the world using everything from a Canon Mark II ($8000 full frame CMOS) to the classic coolpix 950 2mp camera.
If you are totally quality driven then pick the Nikkor 10.5. As it is superior optically but comes with the trade off of being a bit more finicky to master in shooting technique. If you want to do great panos with less problems is shooting then pick the Sigma 8mm. I am sure someone will post a pano example shot with the Sigma.