Kudos on your speakers selection! It seems you have discovered the Variety Prinicple in seeking joy in audio through a variety of expressions. Deciding to diversify in expression of technology was a key factor in finding a greater level of satisfaction as an audiophile.
I do not know if you saw my review of the EX-M1+ at Dagogo.com, but rolling in discrete opamps is a bonus. I will be exploring a new brand of them and will at some point have an update/addendum in regards to opamps. Opamps are cheap relatively, and you can buy a set of them from $100-200 ish. If you are hyper excited by novelty and new rigs, rolling in several different sets of opamps would be like an audio drug; it is exhilarating! There would be a LOT of iterations available to you, especially with those speakers to rotate. I would find that to be a big draw in terms of my thirst to explore new rigs. Most do not have the zeal to continuously build new rigs, but if you do, that would be a variable to provide a lot of fun, and at not too much cost for a few sets. See my other articles on opamp rolling at Dagogo.com.
If you go with the EX-M1+ (I cannot give guidance in comparison to the Modwright, because I have not heard/compared it), then certainly consider upgrading the opamps. There is plenty of discussion about it on the Net, too.
