Electronics to go with KEF LS 50

I like the LS50 but in your case, you might want to try something different - say the KEF X300 active speakers. That gets rid of the need to power the speakers. It's not exactly an LS50 but it is a pretty good alternative.

Then you just need a source. There is a wireless version available as well so you can stream off a PC or even a smartphone or tablet.

I am using Bel Canto REF500Ms to drive the LS50s and I think it is a good match. A few friends have been using the Job (/Goldmund derived) amp with also good results. The LS50 really benefit from good amplification and they aren't particularly sensitive either.

Another Active and Wireless speaker to consider would be the Dynaudio Xeo3. All you would need would be a source and 1 set of Ic's to plug into the transmitter from the source and power for the speakers and source. It even has an USB input if you want to stream from a computer.
http://www.dynaudio.com/int/xeo/Xeo_is_Multi_source.php

I use them at my office with a NAD integrated, sounds great!

I am using a Nad D7050 to drive my LS50s. Although the amp is only rated at 50w per channel at 4 ohm the sound is very very good (I am not a real audiophile so I am not sure about my standards of good sound...). Anyway I am very happy with the combination.

The d7050 is a great small system for anyone that listen to most of its music in the digital domain. In addition, it is very small and therefore easy to carry on a plane (which is what I did).

I would definitely go with computer audio, some great DAC's are very small and you can store plenty right on your laptop and eliminate the need of carrying a CD player or transport.
There are also some decent integrates around today that have a DAC built in. With That, you would need your amp, Your speakers and a laptop and would have very good performance.
good luck, Tim