Avoid Thermaltake watercooling at all costs. Avoid Zalman Reserator/watercooling at all costs. Larkooler...most likely the same.
The H70 performs about the same as most good air coolers, almost apples to apples, except for price. Don't expect miracles from it. I've said this many times, but saying an H70 is a liquid cooler compared to full watercooling is like comparing a Honda Civic to a Ferrari and classifying both as being 'cars'.
The thing with those coolers are that they are closed loop water coolers so it's just like installing a heatsink/fan and there is no maintenence because you supposed to keep the loop closed. However in a regular water cooling loop your supposed to change the fluid every 6 months or so and keep anti-microbal additive in it to prevent growth of microbes and anti-corrosives to prevent corrosion so I'm not sure what the life expentancy is on those coolers if your not supposed to open them up. It would seem to me that the performance would suffer after a while.
Granred building your own loop would be expensive since you have to buy all your own parts and assemble them but it is a lot of fun to do just like building your own computer is. The first time is always the hardest because your not quite sure how it all works but there was a first time to building the computer also.
These are some of the coolers that I would look at.