My mouthpiece is a Vandoren Advanced Tech. 45.

It is mostly about what you prefer I think.

will i played on a fobes debut and recently changed to a Robert DiLutis mouthpiece. i play with my noblet 40 barrel still. thing about getting another clarinet or get a better barrel in the near future

I like the Cadenza mouthpiece. I play on a lot of different ones, but it has the best feel for my style and helps me get the tone I want when paired with a Vandoren 56 Rue Lepic 3.5.
I've been afraid to try the ringless barrels, I don't like the idea of cracks. I live in an unstable and humid climate and the ringless barrel on my Bliss 210 just split on it's own. I opened up the case one day and wham.
I like Leblanc. I own and regularly play a beautiful 1972 Noblet 27 (all wood), and have yet to come across a nicer horn (for my personal preference). The Bliss 210 is nice, a different animal and a wonderful instrument, but I still love the feel of the Noblet. Something magical about this little guy.