Class D is just Dandy!

Although I am the happy owner of a class A tube beast that weighs almost as much as me, I'm curious about class D amps. I'm not getting any younger and handling my amplifier by myself is becoming an impossible task. Not to mention the heat and the cost of maintenance.
I've been looking at some class D amps from Ghent Audio, Temple Audio and Class D Audio. I'd like to buy something under or at around $1000.
Ghent Audio uses the ICEPower and the other two are using the Tripath.
What are the main differences? Does anyone compared any of these three brands? 
Opinions?

Erik, and all the contributors,
After having read this thread from top to bottom - lots of good information - my question is: Did someone compare the amplifiers from Class D Audio to the ones from Ghent Audio? Because most likely I will order one from these two.

Two more questions regarding amplification modules:
How different is the sound of a Hypex from the sound of an ICEpower? Do they have distinctive sonic differences?
And how important (or not) is it to have a dual-mono (in a stereo single case) rather than a single amplification module to produce stereo?

Erik and Noble,
Thank you for your explanations. 
Yes I am going to try a class D amplifier from this new generation of modules. 
I've had an experience some years ago with a Tripath from Dayton Audio and I must say, although cheap and not a truly HiFi piece of gear I was impressed! Now I'm obviously expecting a much higher quality from the new breed of amplifiers. 

I have been asking questions to many people from company owners/designers to dealers and forums members. And I'm getting solid and coherent answers that are helping me choosing the way to go. 
After evaluating many options I came down to three brands that are offering me what I'm looking for as a whole - price/performance/customer service. They are Class D Audio, Digital Amplifier Company and Temple Audio. They all seem to be fantastic choices, but I can only buy one and at this moment I'm closing a deal with Temple Audio - ordering the Monoblocks. 
Soon I'll be posting my review. 
Tank you for your sharing of knowledge! 

Noble,
my speakers are the Zu Audio Omen Def. 100dB, very easy to drive - I am pairing them presently with a tubes SET pumping "only" 24W. 
That review that you mention is for the old monoblocks. The new model is 70W with standard PSU and 100 with the improved PSU. I ordered the best one. 
I'm expecting to get the amplifiers in 3 to 4 weeks. Then I can post a review.