k701, k501, hd580, hd650, sr225 can all sound better with the right amp than k1000s with the wrong amp.
Given $3400 to play with ( 2 pairs of K1000s + big joe amp), I could put together a spectacular headphone rig AND a spectacular speaker rig.
I don't have a good k1000 amp, I don't own K1000s, they're overpriced even at their best.
But you could sell one pair of those, get a firstwatt, and have money left over.
When the k1000 was $400, it + a t-amp was a great mid-budget rig. At $1600, you're on crack. The same $1600 could get you a speaker rig and a headphone rig that would BOTH own it.
I'd do separate monitor and macbook, for the same money. Slightly slower, get an external disk and a good big monitor keyboard and mouse. Much lower footprint than a desktop, but when you want it, still get nice big screen. Then when you go portable, it's lighter and better battery.
This billy moment brought to you by:
Starbucks Coffee
When you need sleep, but your schedule just doesn't allow it, just grab a 2 gallon jug of starbucks coffee. Sure, you'll wander around babbling about things that make you look like a fool, but hey, it's better than nothing right?