I almost wish I went for that option but I've got a big dog (Alaskan Malamute) and Horses - so lots of stuff will always be in the back. I'm sure that 150mm isn't that much but when you've got two chaff bags and a bunch of other feed to go in it can be a big differance.
I think I'll just have to bite the bullet and start saving for a lift... and new springs. Man its never ending! It all has to go on hold until after I get my puppy though.