Reeva, I also recommend the THF6-A.  Perhaps if a new one is beyond your 
price range, you could find a good used one.  The only thing I seem to have 
trouble with is writing and recalling memories without the benefit of 
computer software.  I know once I get the hang of it, I'll have it for life, 
but if someone could send me step by step instructions on how to enter and 
recall memories I would appreciate it.  Steve Dresser did his best to help 
me at the convention, but I guess I am still doing something wrong.  73.
Harvey