ButsAndNolts

If you can, wait for 3rd party benchmarks... and from reputable ones such as Gamers Nexus and Hardware Unboxed or even Tech Deals.
 
But if you absolutely must and you want the best performing GPU right now, 1080 ti would be the best deal.

wait for 3rd party reviews

I know the SM7B is rather gain hungry, so a cloudlifter would be handy, tbh.

IDK tbh, audio GD products tend to have a more pronounced bass, but it isn't like a amp is going to make a flat'ish headphone into a bass monster.
The millet starving student might be a option, but it is diy and different tubes will make the amp sound differently, this really goes for all tube amps.
The last one from the top of my head would be the Dynalo, it is also a diy amp and there are very mixed opinions about it, but it certainly colors the sound.
 
I can't really help you out more than that.
 
Just as a side note, I would recommend getting a nice clean DAC and amp and then let the headphones change the sound, so if you want a bassy sound then get bassy headphones that you can switch to.

I wouldn't want to pay MSRP or close to it, for the MSRP I can get amps like the Meier Audio Corda Classic or the Little Labs Monotor which are both IMO better amps.
This is what I think that is wrong with it: The dynamics sound compressed, narrow and dead sounding. 
It measures well, but I wouldn't want to use it in a studio setting, you can get gear that is also meant to be neutral that sounds more dynamic and alive, like what I just listed. I know that this goes against what a lot of head-fi reviews and such say, but I also kinda doubt the experience a lot of the people reviewing it have. I can see how you could call it neutral and analytical and great if you don't have a lot of experience with gear in the catagory it is aiming for.