when I first started using e2e's I was running 10mm beeline, and switched to "ultratech" or technora, which is a stiffer, or harder cord; when u switch to a softer cord like 8mm beeline or armor prus, I noticed I had to spread the knot or push it up the climb line a bit when it was new. I'm not a fan of distel really bc it can tighten up pretty quick, and also if one of the legs crosses over the other -- I wouldn't waste my time getting a 28" cord for a distel -- just get the 30" and use either the VT or XT -- XT works great as well, great knot. Ocean wears out really fast compared to armor prus in my opinion. Really really fast. 30" armor prus VT or XT is boss over ocean poly, imo.
for drt -- I have a 120' luna, and a 200 blue moon. Great climb lines. easy to splice, lightweight, and very little stretch. I'm ordering a donaghys cougar 11.7 for my next line though just to try it out -- didn't really care for rocket -- I did splice up a long flip line out of rocket though, and the long tail bounced off the bar of my 200 and it didn't fray at all though -- probably just luck.