For a reasonable price i would go for flyingfisherman polariods, they were given a good rating in the mags and ive had a pair of ambers for 3years or more now and they aint broke yet, i paid around £30 for mine but there are some better spec available in the range, i also have 4 pairs of aldi glasses which do the job too, sceirra pair arnt that great, my best were a pair of fox ones which i promptly lost

__________________
If in doubt, get the montys out

Intelligence is relative to your environment