For the under $500 category, the Grover SCs are great. Eventually I became aware that there was a little too much happening in the midrange for me (a bit forward at certain frequencies), but perhaps they simply revealed my system as it is.
I fell under the spell of Kubala Sosna stuff, though, so my Grover's are in storage. Needless to say, even the level of KS I could afford, not the top of the line, is much more expensive than the Grovers. I remain a fan of the Grovers (that is why I haven't sold them). In some systems, they might be as much as anyone needs. Certainly a great place to start, and perhaps, to end.