Hi, im looking to buy headphones for my guitar amp (Line6 Spider Jam). Anyone got any suggestions? Not too expensive ones, please.

Cheap headphones (sub $25) are great for playing with an amp because some of the hum and hiss generated by high-gain is outside the range that shitty headphones can reproduce. I use ten year old $20 Sony headphones with my amp and leave the good Shure headphones for other things.