Monitors for Extreme Near-field listening

I can't seem to get a good sound out of the speakers that I use on my computer desk system. I wonder if LS3/5A monitors will help, as I have heard they are good for very-near-field listening.

My setup now includes:

Jungson DA-I200A power amp
Parasound P3 preamp
Consonance 120 Tuner.

My current speakers are Acoustic Energy bookshelf speakers, but they sound rather 'thin'. I have other systems with similar/lesser speakers/components that don't have this problem - for example, I am now listening to a Carver amp, Parasound Tuner, and Baby Advents, and they sound just fine.

So would LS 3/5A's or more modern equivalents such as Spendors or Harbeths help?