Would like a laptop except for the keyboard: tablet as a costume-made laptop?

I'm going to college this fall and I'll need a portable pc - but I've never liked those flat laptop keyboards, and I'm going to be writing a lot so this is important. I'm a good typist, but I need a full-blown desktop-pc keyboard in order to type fast and with little misprints the way I enjoy. Seems wasteful to connect (as I've been doing) an external keyboard to a laptop, and have the laptop's keyboard just sit there taking space.

So I was thinking, maybe I can customize my own "laptop" by buying a powerful tablet with complete "real"-pc-potential, and then shop for a good keyboard & mouse to connect to the tablet via usb / bluetuth.

Since this will be my only computer, I need to think this through. I need to be able to use it comfortably for writing in office word, surfing the internet, streaming videos, watching movies, printing documents, using software such as torrent and photoshop, transfering ebooks to my Kindle, downloading photos from a digital camera, etc. (everything except gaming, I guess).

So the question is, are we really there, tablet-technology-wise, or is this premature? Are there really tablets out there that fit my "laptop" building scheme (in terms of ports, features, operating system, etc.) or will I end up with a limited hybrid that won't satisfy my aforementioned needs?

Thanks