Congratulations on a beautiful pipe!
I suggest cracking open that EMP tin, scraping some off the top and letting it air dry some, then load the new pipe and smoke it nice and slow. To my palate, EMP is slightly bittersweet from the Turkish, with the smokiness of the Latakia. A very different experience than the 1Q and a bit more Vitamin N.
Mississippi River doesn't rock my boat due to the Perique ( weird mouth chemistry ) , and I haven't forayed into the Ashton blends, so I can't speak for those.
Make sure to keep the mortise and airways ( stem and bowl ) free of juices that way you'll have a sweet smoke just about every time. I usually curl up a paper towel and sop up the mortise once the pipe is cool, and pipe cleaner the stem and bowl airway. Keep alcohol away from the bowl and use sparringly on the bowl airway and mortise, perhaps once a month. Paper towel the bowl once cool so it doesn't get bogged. I use a bottle brush and a 12 ga shotgun brush to even out the cake and knock out remnants. It sort of becomes second nature after a while.
My first real pipe was a little Peterson Aran 03 Apple, it's going to be retired from the rotation very soon. Smoked it 5 times a day for about 6 months straight, used a torch lighter, burned the rim, ran it hot, over reamed the chamber, the stem got loose, anything you're not supposed to do to a pipe, I did it. Now it generates a lot of moisture after every smoke, no matter what I put in it. Still smokes like a champ, but I don't want it to give up the ghost.
Rant over. Hope it helps !