There's several things to consider. If you want to use Microsoft Office apps, you have to use Windows, unless you want to purchase "Documents to Go" on a tablet. Tablet PCs are a dead media - they combine the touchscreen of a tablet with the size and clunkiness of a full laptop... along with generally poor battery life, weak hardware specs, and a high price tag.
It looks like you do some construction or design - that will generally be tough to do on a netbook - the touchpad and keyboards are generally tiny and hard to type on for most people. A 10.1" screen is rather hard to see as well - you don't get the resolution that you would on a larger laptop.
I would look towards getting a 13" or even a 14" laptop. However, look at a lot of models and compare the weights and specs. Some will have more features and weigh a lot more. Also make sure you check the screen size and resolution. Many manufacturers will give you a cheap screen on an otherwise awesome laptop.
If you need any suggestions/etc, please let me know.
Old Bridge Rifle & Pistol Club in NJ (Where JJ Racaza sometimes shoots...... name drop!) uses Palmpilots. They import the scores using that. It helps with results - gets done very quickly and the scores are usually turned around the next day.
There is an app for the iPad/iPhone/etc. called IPSCore Pro.
http://www.doublealpha.biz/daa-iphone-applications/ipscore-ipsc-scoring-application