The MSI Wind is one of the new generation of "netbooks" - small laptops with Intel Atom processors and 10" or smaller displays. My Wind worked well with the Perseus, running at 800 kHz.
The ultimate portable reception setup would be a Wind and two SDR-IQs, since you don't need external power supplies for the IQs. This evening I tested this setup, and I was pleased (but not very surprised) to see that the Wind copes admirably with two SDR-IQs. The screendump to the left shows two instances of SpectraVue running. The CPU load was 60-75%. Luckily SpectraVue is resizeable, so the two windows can match the small display reasonably well.
Now, the current 3-cell Wind doesn't have much to brag about in terms of battery capacity, so you should either buy the 6-cell Wind or a replacement battery if you plan to spend a few hours on the beach. The two IQs take their toll on battery life.