Marantz Pearl Lite for LS50, or..

Hi everybody,

I just bought the KEF LS50, and currently in the looking for an amp.
My room is not very big, roughly 15m2, and I'm initially looking at Roksan Kandy K2, but currently there is one seller in my local forum is selling his few months old Marantz Pearl Lite, so I've been thinking about it.

Does anyone know whether this pairing will work in my room?

Also, as I'm totally new in this thing, will a pure Class A tube amp with 18 Watt sufficient for my room?

Any other recommendation is also appreciated.

Before I forget, my budget is roughly at $1500, and I listen to most type of music, especially progressive rock, jazz, metal, bossanova, etc.

Thanks in advance.