Why can't Air & Water cooling exist in one unit?

I'm just wondering why can't there be a product that combines a CPU waterblock that includes heatpipes with fins? That way I can benefit from water cooling and fans cooling.

Thanks belial2k for the insight... I've just graduated from CSUN with my M.I.S. degree and boy after reading some of the threads that all of you post, I feel way behind on the technology. What would you say is the best water cooling setups out there that I can put together? My girl friends and I are planning to setup a gaming cafe next to our university, and we need some badass attractions.

There are a lot of variables involved as the above post points out....and to do water right it is not cheap. How many machines do you want, and what is your budget per machine? I would think water cooling would be out of the question for your intended purpose do to the potential for damage, expense, and maintaining them. A lot will depend on the monitors you choose...the lower the resolution the lower the demands on the machine. Of course if you want a couple of showcase machines you don't let any idiots touch you could maybe do it to those. But just my guess, if a bunch of girls are running a gaming cafe you will already have all the "attractions" you need to be a maximum capacity.

I have used several different brands, and basically it all comes down to the radiator. And bigger is better. The more fans and more surface area, the more it will cool. A pump is a pump, fittings are fittings, and waterblocks are pretty basic. If you do your research and know the basic plumbing, it will all come down to what radiator you use. The smaller compact water units are really no better than air cooling, you really need a unit with 3 120s or more to make the trouble of water cooling worthwhile. I really don't know what is best on the current market, as I've moved to TEC cooling for most of my extreme rigs. If you are just looking for good overclocks, any good air cooler will get you over 4.0 with the D0 stepping.