Yep, the steel ones are cheaper, but the fibre wraps are so much more comfortable and you will be pleased with it a lot more.
But good luck with your buy. You can get fibre wrapped tanks for cheaper on the forums though in the classified section, i got a HP fibre wrapped with bottle cover for £65-70.
Take a look around, see what you fancy. Also you can search for what you want using the search button above(near your login name, to the top right, beneath private messages)
Good luck with whatever you decide to do though.