bonjour, Eric.
Mon VP100 est tres magnifique! (please pardon my poor French, and understand that it is offered in the spirit of friendship and welcome)
The VP100 is a very good speaker, and I think would work just fine in that room. My room is larger than yours and I am well satisfied (of course, I have not heard the VP150).
Also of concern to me is that the VP150 is a VERY large speaker. Placement and aesthetics could impact your choice.
Another reason that some people choose the VP150 is that it is perceived to provide a wider "sweet spot", so if you will be having Home Theatre where many people will be seated across a wide area of the room, it might be a good upgrade. If it will be mostly just you and one other special person sitting together, it may not make such a difference and the VP100 will be fine.
