I'm a committed thread-count girl and once you've sampled 300+ (oh-er missus), you'll never go back. Unfort, I do think you won't get the best of both worlds - the 300+ stuff is all cotton so will need to be ironed. Although I just don't bother ironing them, you could also send them to the laundry for a wash, dry and fold, which should be around a tenner for a load. They won't be as good as ironed, but that will get most of the creases out.
Sprite