One of the hardest lessons in life is to buy once and buy right.
It only costs more to buy wrong, throw away and have to buy again.
Don't settle for anything less than great when it comes to comfort in the field.
Nothing worse than being cold/wet so don't skimp on warm/light sleeping bag and a tent that will handle some "weather".
Not quite as important if the nights are permanently warm and dry where you live, but I'm yet to find somewhere like that despite having lived in numerous countries.