Low budget vintage preamp or new

I’m new to this hi-fi world and wow wow wow it is so exciting. Been nerding out big time in these forums and am happy to be a part of this now.

I got Heresy IV’s, a McIntosh MC352, a Project S Box and a $50 amazon dilvpoetry preamp. I spent nearly all of the money I have right now besides about $1,300 I saved for a preamp. 

I definitely want a tube preamp, and am looking most closely at the Audio Research LS7 and the Schitt Freya +. Honestly even with the $50 preamp I’m still totally floored every time I turn the system on and do not think I have had a single conversation with anyone in the past couple weeks that did not at some point turn to how dope the hi-fi world is. 

What are your thoughts on the lower end Audio Research amps? I’m a bit nervous they’ll hum, that I’ll need to spend a lot of time and money repairing them, and that they probably won’t work so well when I use my system to play movies, which I will certainly do at times. 

What do you think? Are there other preamps I should be looking at? Thanks so much for your time