I am testing different panoramic stitching tools and I find one of them – The Panorama Factory v3.2 from Smoky City Design – particularly good:
Two examples I generated with the shareware version (30-days trial), the first one with 6 JPEGs (2048×1536), the second one with 7 JPEGs (2048×1536). The original “usable” output sizes are 8851×1265 and 10338×1368 :-)
The full product costs $59.95 and I think I will buy it :-)