Yes I think its worth it, I still use the aquarius 11.'Out of the box hooked up' I was getting temps around 34 to 42 core temps. I was in the mid 50 to 60 even higher if I overclocked while using a stock heatsink. On the other hand a good heatpipe may do almost as good with less hassals but I don't think so unless you have a real good custom made case that has the best air flow and space.
I have never had a condensation problem when using watercooled system,not untill I chilled the water did the condensation start.
I have used this water cooling setup almost 3 years and it has been a real treat being able to overclock ever machine because the system is cooler.A cooler processor all the parts work better, frame rates increase, system runs smoother and faster refresh rates in higher resoulations.