Hi John,
Thanks for your reply. It really helped me decide to order the 6 inch OO f/5. I was in doubt wether to buy a TS UNC 6 inch f/6 newton or the one from Orion Optics. But in the end, I already have a 12 inch orion optics dobson since 2006, with a really smashing image quality, I decided to go for Orion Optics again. I love to observe star clusters and the moon with the 12 inch OO but there are quite a few evenings when I want to get out quickly and just for an hour or so, and sometimes I also do not want the hassle of getting the 12 outside. So I was looking far a light-weight option, but with a good quality mount, telescope and setting circles. I ordered the Ayo already, and now the 6 inch orion will be added. I will also use my Argo Navis on the Ayo as well. And in the future I hope to add an 8 inch Cassegrain to it from TS in Germany. This mainly for double star observing.
Anyway, thanks again for your advice.
Cheers
Math