My unsolicited opinion is that you might want a spare. There's no 'need' for all the versions... you just need what you need. You have done collections in the past and now seem to no longer need to do that.. rather a simplistic life if you will.The "M" is perfect 4 me?
The EVO is special in my case. (Use it the most)
However... if you use the M daily, as I said, it may be a good idea to have an 'extra' in rotation. Just in case. Now.. whether you choose that to be another M or a Ti tip... that's your choice.
And who knows... with the upcoming contests you may win one and that will negate any worry about a decision... for the time being at least.