I bought a lot of Roller Mesh, that stuff is so expensive but the tension levels are incredible. If I can get the Smartmesh even if it is only the 150-T to anything close to 35N then I will make the switch.
With being in Japan and your price on Murakami S mesh being so cheap I would just stick with that.
Less chance for moire, less pressure, save on ink, btw you don't need the tensions of Roller Mesh / standard T mesh. S mesh is so much nicer than T. I hate sometimes having to play with the print settings with T mesh, S mesh I know what it all needs to be at and it is versatile and forgiving a bit.