If it comes to keyboards, nothing can top Lenovo (formerly IBM, but the people who work there are still the same).
Take a look at the X220, it has the classical Keyboard which is a dream to type on, it also has a 12,5" IPS screen which is bigger than netbooks but smaller than normal 14" or 15" notebooks, so it's still very portable.
At only 1,4Kg with 6c battery, it won't weigh you down either. It has 3 USB Ports, fulfills military standards (VERY durable!), lasts 6h with 6c battery and 9h with the optional 9c and sports a full voltage core i processor (i3, i5 and i7), so multitasking is no problem.
I can vouch for netbooks having great battery lives, and while mine can't handle photoshop it runs Paint Tool SAI with my Bamboo Capture perfectly, and I can multitask just fine. And it's a piece of crap compared to newer netbooks. Look for something with an nVidia chip and a dual-core Atom processor.
I actually have a pretty crappy local-brand Atom N455 (single core, two threads)/ 1GB RAM / Intel GMA graphics. Nowadays you can find models with two cores, 2 or more GB RAM (this is important for mulitasking) and nVidia graphics chips, and that's what you should be aiming at.
The laptop processor is typically a lower-powered processor than those found in similar desktop machines, although some laptop makers have used desktop processors in their laptops to get a performance edge. Processors designed for mobile computing generally consume less power, and thus run cooler than desktop processors. This is important because you want your battery to last a long time and you also don’t want to burn a hole through your lap. Desktop PCs typically have massive heat-sinks and fans to cool them down, but it’s hard to fit that stuff into a tiny laptop, and fans drain laptop batteries quickly. Resources:[link]
I absolutely agree with ASUS. I always buy the top of the line but refurbished. You pay the price of the low end model for the top notch and if you buy at trust worthy sellers (I personally always have had great experience with TIGER DIRECT) you get exactly the same guaranty on a refurbished model. I got myself a ASUS gamer laptop and I am not a gamer. I always get gamer hardware with good reviews because if it can run the big games it will run everything else and Model G60VX Total amount of system memory 4.00 GB RAM System type 64-bit operating system Number of processor cores 2 it comes with an excellent geforce gtx 260m cuda with 1 gb of video ram and It also has two hard drive slots so you can either have more room or have the option of making a killer raid set up. The new laptops are even better. The gaming laptops are robust and usually have very decent keyboard .Mine have lighted keys with a controllable dimmer and I have been really enjoying this feature every time I had to work in darker places... Personally I always prefer a keyboard ..I use a wacom tablet and run the complete adobe cs6 suite + complete office 2011 and loads of software and I have windows 7 pro on it and I paid much less then your budget . I paid around 675 + tax and shipping for it and bought an extra hard drive. For 900 $ if you take your time and buy at the right place you can have a very very decent machine + a tablet. One suggestion is always to read user review and pc magazine reviews of the exact model you plan on buying to avoid having a laptop that is full of bugs and problems.