i bought me the 289 as a kit a few weeks ago and must say its an EXCELENT Multimeter. as you statet there are just small differences. like the low ohm range.
fluke mentioned it as to be usefull for someone who does lots of "high current motor stuff" going on. well i dont do that, but i found it handy on meassuring cables, low ohm resistors or connections, since it seems this low ohm range is even more precisely as the normal ohms range.
to me it was not important, but i just wanted the lil extra "just in case" i would need it one day, and i already used it few times yet.
So i thing its more a question of "commitment" (dont know a better word yet), or the question of beeing ready to pay the lil extra.
if the extra money is a problem and u do not work with this kind of topics, you will not need it. else i found it usefull and my decicion to select the 289 been correct yet.
and im just an "amateur"
not a everyday electronics engineer. but i love good tools.