I dont have any real expensive glass but do have a few sets of midrange bincoulars and have some opinions to share. I like porno prisims. Roof prisoms seem to be a bit better at giving a sharp image but thats only if your comparing bincos that are equal in price. Problem is many arent water proof unless your up into the higher end stuff and there heavier and bulkier. I own a pair of mid range minox 10x40s, a set of steiner 7c50 military and a sent of 8x42 nikon monarchs. Best one of those for the buck is the nikons. theyve got as good or better glass then the others and are about half the price. I also had a set of vortex razors 8.5x42s which are more expensive and had better optics then any of the other three. They were heavy and big though and someone liked them better then me and lifted them out of my truck right in my driveway. Ive looked through alot of differnt bincos and those razors would hold up to any of them at any price. Money will determine what you get and if your looking to get decent glass at the most reasonable price id go with nikons. There warantee is one of the best to boot. My monarchs were about 13 years old and i noticed last summer they were really focusing in right out past 500 yards. I sent them to nikon and within a week had a brand new set of there updated monarchs that were a model up from the ones i sent them. hard to beat that.