First, welcome to the site!

I don't know the speakers you are using, but I am a big fan of Luxman so must have have very good taste . I will say just based on the math that depending on your room and how loud you like to listen 2 watts may not enough considering most speakers are less sensitive than the manufacturer advertises. If you have a small room and/or listen at low levels it could work but the wait for an amp is long (you know about the waiting list, don't you?) and it would be a shame to get an amp that wasn't right after a long wait. Of course you can get a higher powered Decware amp, or you can get two of the UFO amps and use them as mono blocs. You can see page 17 of the UFO manual for details:

https://www.decwareproducts.com/_files/ugd/f1f204_e1b8a7c7f5f74930ae24a5c7b28d10...

I did this and liked it so much I got back on the waiting list for a pair of UFO25 amps. There are many helpful posters on this site and I'm sure you will get other opinions and ideas.