Which Line Level, Balanced Preamplifier?

I am running Monitor Audio Gold 100 5G speakers and am still deciding on what amplifier I am going to use. I came from a low wattage system when I bought these speakers, and they're quite demanding, so I am looking at something powerful. Almost everything is in the running, but I know I want it to do its job and not have too much character, so I'm considering Benchmark, Parasound, Ayre, Denafrips, etc... This is a different discussion though.

I want to shift my focus to preamps because it might help me dial in my amp choice along the way. I am looking for a fun sound. Not warmth, necessarily, but an engaging, deep and wide soundstage. Definitely not clinical or dry. I have been reading and have been sold on all of these:

-Ayre K-5Xe-mp

-Wyred 4 Sound STP-SE

-Denafrips Athena

-Parasound JC2

-Benchmark HPA4 or LA4

-PS Audio *preamp coming this year* (I'd have to wait for this one, but I'm excited about it)

I would love to hear a strong, educated opinion before I spend the money. Open to other models as well. Tried to find an older model PASS, but people don't really universally love them and I've read they can be a little less engaging in the wrong system. 

Thanks in advance!