An Instructive Moment

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After a long game full of errors we reached the following position.  This is from the 2016 Sudbury Ch. Black to move...

It's a good thing I had a fair bit of time left on my clock, because it took me nearly 35 minutes to make a decision. 

Here's what I went for...

So... the question is this: 

Was Qf5, allowing the rook endgame, a good idea?  Obviously black is better, but is it drawn with best play?  I posted my suggestion for white, but maybe there's better?  

I would love to see some analysis/debate about this position.  I think it could be very instructive as positions like this (or the potential for these positions) arise so often!

I might try to post more detailed analysis in the comments, but honestly I'm not sure how to evaluate the position.

MapleDanish
NM Matt Nicholson

"The ability to work hard for days on end without losing focus is a talent. The ability to keep absorbing new information after many hours of study is a talent." - Garry Kasparov