cheapest ones iv found (new) are full flight. iv heard mixed feelings about them. some say good, some say bad. however, one thing that alot of people will agree on is their crappy tie rods. most people end up bending them. my buddy has a set of the flights on his yfz450. they have been good to him other than the tie rods. one of them completely collapsed. he was not doing anything out of the norm either. so, if you are going to get full flights, and you ride trails/recreation........id suggest better tie rods.
i didnt want to break the bank when i was shopping for arms either. i narrowed it down to either "wicked" or "ASR" (american star racing). they are similar in price. you can get the wicked's in quite a few different colors for free....you have to pay for that option with ASR. the thing that sold me on the asr's is their customer service. you can find both products on ebay.
another company getting VERY popular is JD performance. i know a few vendors on the site carry them. i have never even seen a set, other than in pics.....but alot of people on the forums are starting to get them. they are a good bang for your buck shock.
id also like to add that you should also look into some yfz450 or raptor SE front shocks. both of them make a HUGE difference over the front stock shocks. the raptor SE shocks can be had for 250-300.....the yfz's seem to go a little cheaper as long as they are not brand new.
