Stereo advice: Fix NAD 7045 or save $ for Harmon Kardon 330C?

Very much a newbie to all this stuff and could use some advice before we spend on either!

My bf found a good condition NAD 7045 that we’ve been using with our xbox (tv) and turntable, and has been working fine up until recently (he thinks a fuse went out). I’ve heard a lot of good things about the Harmon Kardon 330c (for vtg on a budget) and am wondering if the NAD is worth fixing or should we sell and save up for the HK? Would it be a world of difference / is the build quality far more reliable?

Thanks for any help!