Hi Hannah!!
I have Egyptian Cotton sheets!!! I love them!!!
The ones I have are 1000 thread count... or so the tag says...
They are on the pricey side... I think I spent about $80.00 for the set.
(fitted, flat, two pillow cases)
I got mine from overstock.com they had the best prices...
My mom sent me some that are 800 count and very nice too... she said she got them from Costco... she wouldn't tell me the price... but knowing mom...she got them for a bargain.
I haven't had any problems with them "knotting" or whatever it's called.
I hope you find something that works for you...

Abbie
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My avatar pic is my beautiful
niece Ashley!
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Rest in Peace
3/8/90 ~~ 4/2/12