It's totally up to want you want :-)
I often cut spikes because I want the plant to invest in roots and leafs adn I hope it will give me even more and fatter buts the next time. Sometimes I decide not to cut the spike, for instance in a Phal that always makes new buds at the end of the spike. This one might grow a longer spike in the future in addition to new spikes.
You could cut it just above the upper node, it might reflower in a short time span for you.
Well, as I said before, it's what *you* want. Keep in mind that in a forest no one cuts the spikes that ended blooming. On the other hand, a spike that turns brown never will rebloom, at least not from the part that turned brown.
I doubt if I was any help for you