I would love on of the higher tech Polar ones but they're just a bit outside my budget. I really don't care whether it's fashionable or not or if I can use it as a watch or if it lights up or whatever. I'll probably only use it during work outs anyway. I'd rather it didn't slip, but if it does can I do something to make it not slip without affecting the accuracy? I know, slim chance that there's a decent one for under $100, but worth a try right?