A netbook is a great way of having a portable DVS setup. However due to the lower specs you may need to be wary of what you run. 1.6Ghz SHOULD be enough to run Cross, but I'm not sure how Cross handles yet on netbooks. Eventually it should be ideal for netbooks when the Linux version is complete, but for now I'd recommend DVS7 / Producer.
There's lightweight skins designed for netbooks with Producer/DVS so you shouldn't have a problem there However, wait and see if anyone recommends Cross on those specs before buying because if Cross would run, I'd say it would be the better choice.
3-hour radio show, Mixvibes Cross only! http://soundcloud.com/stealthii/isa3 MacBook Pro 13" Summer-2011 16GB RAM, Vertex-III SSD OSX 10.7.3 Ecler Evo 5 Mixer Technics 1210MK5 x2 Ortofon S-120 OM carts x2
i'd recommend DVS or Producer with your configuration... It's a software that worked fine with older generation machines and still does great with them...
If you tweak your computer it should be fine for club use. I strongly recommend a network-free dedictaed partition on your hard drive with windows XP SP2...
Edit : however you should download and test both demos first to make an educated choice