I’ve been shooting Minolta glass for almost 30 years. I’m especially fond of the earlier MC lenses, but the MDs are also excellent, many of which were designed in a partnership with Leitz.
The 50/1.4 is very good, indeed.
The XE-7 is, essentially a “consumer” version of the XK, a camera that was meant to be a professional press corps camera but never really caught on. Minolta dropped the interchangeable finders and a few other features, but the electronics are essentially the same.
I‘ve never owned an XE-7, but I shot with an XK for several years and loved it. Sadly, some of the “professional” features of the XK also led to somewhat dodgy electrical contacts so examples of XE-7s found in the wild are much more likely to be working reliably than their more expensive older brothers as they had fewer things that could go wrong.
Worn contacts in my beloved XK eventually made it impractical to repair and I gave it up. Had I been using the XE-7 it would probably still be working.
In other words, yes! Buy that camera!