You should check out the Simaudio I-7 or the I-5.3. The Sims match quite nicely with the Dyns.
I have an i-7 paired to the 5.4 and it barely feels warm the the touch despite running them for hours on end. However, it is solid at ~60lbs.
I have an i-7 paired to the 5.4 and it barely feels warm the the touch despite running them for hours on end. However, it is solid at ~60lbs.