Forget about Windows RT
Trust me, I have done the whole windows RT / windows 8 tablet thing to death and am now on my FIFTH! different win8 tablet
RT uses arm (snapdragon) processor so is unable to run any x86 application. You might not be THAT bothered, but until you really use it in anger you can tell the small subtle differences between RT and full blown 8.
If price is an issue (guessing not since you had an ipad) look at the atoms. Initially I was very sceptical about atoms since I always thought they were too slow and useless. Turns out the atoms are faster in everything over arm and tegra.
The ASUS ME400C is my personal favourite as it represents fantastic value for money. THIN (were talking ipad 2 thin), LIGHT (again, as light as an ipad 2), Fantastic Battery life, CHEAP! £300 cheap! That's amazing for what you are getting.
I was almost about to put down a lot of money for the intel I series tablet like a Surface pro, till I actually had hold of one. They are too thick and battery not as good IMHO
However.....whatever you buy will be a HUGE leap over the ipad. It took me a good couple of weeks to adjust. Remember, windows RT / 8 tablets are NOT tablets. They are laptops in a tablet case. If you're ok with that you're gonna LOVE IT!
there's your problem. You're pretending like WinRT is a full blown OS. It's not. It's more like a "tablet OS plus" - a tablet OS but has bonus features like MSO. But still, it was never meant to be a desktop replacement.