Any Bluetooth wireless speakers that you like?

I'm looking to add sound to the living room in a WAF friendly manner.   Gotta be inconspicuous and no wires showing!

I'm thinking a wireless Bluetooth speaker that I can connect to from tablet or Smartphone running my favorite music apps is the way to go.

Any particular good sounding ones that you have heard?

The retro-styled Marshalls would fit in aesthetically I think.  My wife likes retro!  Maybe the portable model.

Here is latest model Libratone Zipp dimensions from Amazon site listing:

Product Dimensions 4.8 x 3.9 x 10.3 inches; 3.3 pounds

UE Boom 2:

7 inches x 2.5 inches x 2.5 inches  1.2 pounds

$299 for Libratone, $199 for Boom 2.

Mega Boom is slightly larger according to listings. Same sound only bigger?
The original style Grey Libratone Zipp is on sale on eBay for one hundred and seventy dollars. It's the same one my friend brought over this past weekend. It sounds really good and its big enough and loud enough to fill a good sized room (maybe not to party levels, but that's not my need). I'm going to do a bit more invenstigation to insure it meets my needs, but I think I'm going to jump on one.
I've read some older Libratone models are Airplay only not Bluetooth, so be aware of that.
Well, after hearing it in  local Best Buy and finding a great price online (sorry Best Buy),  I'm giving a white Harman Kardon Onyx Studio 2 a shot.

I listened to it using Plex app on my Iphone 6s to stream from my music library at home and it hit the mark for me
good choice, mapman. modern looks & is likely to blend into your living room with other furniture accessories.
looks very thought out under the front grill (the center piece looks like a passive radiator?):