The biggest is an 80 gigabyte one, the 1000H. You may want to look into the Acer Aspire One for the bigger HD and cheaper price. Also look at the Gigabyte M912 (that number may be wrong so just search for Gigabyte netbook), it is a convertable table that may better suite your needs.
Also since you're already into hacking, they make touchscreen kits for the EEE's, so that's work a look. For more EEE hacking go to eeeuser.com