55" TV is it too big?

[PicassoPigeon]

Thinking of purchasing a 55" X90J Sony. At the moment I've a 40" screen that sits within a set of cabinets. The 55" would have to come forward if those, and overlap the edges of the cabinets.

Would it look too big?
Would bias lighting still work?

Thanks

 

[PicassoPigeon]

From measuring, the 55" would cover the white sections left and right, and part of the top cross over. Would it look stupid? Just want the biggest I can have that looks ok.
Thanks for your thoughts.