You cannot install normal windows 8 on a surface RT. It's an ARM device and only Windows RT will run on it.
Doesn't Windows 8 came installed on Windows RT?
I've been considering a tablet for my ergo travel keyboard and have considered many of the available choices out there. If the iPad were usb compatible it would be a strong contender because I like the 4/3 aspect and I use a Mac for most of my needs. Unfortunately my keyboard's usb need prevents that option.
It seems that tablets fall into two categories, both with their advantages and disadvantages. In one camp is the full powered, often larger screened, laptop replacement which would be perfect if not for the added weight, extra heat generation and limited battery life. It appears that the Surface Pro is about as good as any in that category. The second camp emphasizes light weight, good battery life and easy handling at the expense of limited power and function. The Surface RT seems as good a value as any in this category. Of course these are observations based on others reviews and not personal experience.
I already have a large powerful laptop that I could use my keyboard with for occasional power needs, although it will be pretty bulky. Because of that I'm leaning toward the less expensive, cooler, more portable, power frugal option. Because its main use would be for word processing and internet surfing, I think the RT might be a good match. Besides, there are plenty of bargains out there, "For sale, Surface RT, used 1 hour, great product but not what I need - $200".