you are going to get yelled at by a bunch of ppl who have NO experience with bags or cylinders. So ignore their flames.
Okay, it depends, if you in for handling, they aren't worth it b/c they are a pain to get the right psi to handle well.
If you just want something that is low, then yes, get bags, cylinders suck, they stick and without accumulators, they ride rough.
Bags do not ride rough, they just take 500 miles to "break in".
They make bolt on kits that you'll just have to do some minor trimming up front to get them to work. Running the hose, fittings, valve hook up, its not hard, if you read up on it.
btw, stay away from aim, blow jax, chassis tech.. its essentually the same pos company. Get EAI if you're going to get them.