I used to have a K750 before spilling coffee on it... Absolutely loved it. Still reckon its one of the best keyboards I've ever typed on. I've moved onto mechs, but still miss it! If they released a TKL version, I'd buy one in a second.
Some really nice big screen setups. Interesting to see people are starting to use TV's as monitors. Not sure if I could hack a 48" screen on a desk, might be too large for me! Still look really good though.
Yeah if you're planning on using the tablet for any serious computing stuff, wait for the i7. Whilst the i5 is fine for most everyday tasks, if you're planning on using this for photoshop/graphical tasks, wait for the i7!