New computer time!

Some of you may be wondering why I would make a topic like this; I am, after all, an A+ technician and knowing about computer hardware is second nature to me. But I've come to quite the indecision. This is not a question of "what's better" it's a question of what do you think will be the most versatile for me. Also, if I had the money I would just build a new PC.

First up, an Asus Essentio. 1TB HDD, 3rd gen core i7 CPU (3.4GHz or 3.9 over clocked), 8GB of RAM but the board can handle 16GB. http://www.bestbuy.com/site/Asus+-+Esse ... ifications
It would seem that this is best idea for gaming and running NL on "omgwtf uber real" graphic settings.


Next, an Asus 23" All-in-one. This has the touch screen. 1TB HDD, 8GB of RAM, 3rd gen core i5 (3.0GHz and 3.2 overclocked).
http://www.bestbuy.com/site/Asus+-+23%2 ... ifications


Now, obviously, the all-in-one is the most versatile, but I don't know what that board can handle for RAM. But the question arises - What PC is a better choice for me? I'm a mechanical engineering student. I use Auto CAD, and the touch screen supports a stylus. I also think that the touch screen would be cool with hand building in NL. Would I be better off buying the all in one and a stylus or the tower and a graphics tablet (like a WASCOM Bamboo tablet)? Anyone have experience with both?

You are a computer technician, yet you're shopping at BestBuy? I'm shocked.

Build it yourself and save some money by getting a copy of Windows for free through your school.

I'm buying at best buy because the price is the same at newegg and tiger direct. I would order through them, but I'm really impatient and I want my new toys right away. Also, I get reward zone points. Besides, it's not like I'm sending my stuff to get fixed by douche squad.

When I build computers, I go all out and I really don't have the money to do that. The hardware off the shelf is really good at half the price of building it myself. As far as getting a copy of Windows for free through my school, I don't plan on it. I have a copy of Windows 7 ready to go.