If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
Don't know the other two lenses you mention, but the Tamron SP 180 f/2.5 is a super lens.
I've been using one on both an Olympus OM4Ti and a Canon T90, for quite a number of years now. It produces great images on both cameras, and has never let me down yet.
Good luck in your quest.