Suggestions for bookshelf speakers that have great dynamics, budget of $500 used.


So I really do not know where to start with bookshelf speakers as not been in the market for any for ever it seems.
This is for a second system where a pair of Monitor Audio Silver 3i are currently doing duty.
Room is largish and open but ultimate sq is not the aim as it is occasional use only, but when I do fire this rig up I usually like to play fairly loud.
Sources are many, fm radio, cassette tape, vinyl and streaming.
I have plenty of horses to feed them so even inefficient models can be considered.
Prefer to buy used as big savings to be had obviously and already broken in.
So suggestions around a maximum price break of $500 used.
Thank you in advance.
128x128uberwaltz
The Legacy studios are very good call but again doubt if can be had for $500.
You never know though.

Mapman.
Have no experience of Ohm speakers at all.
If you're willing to go bigger than bookshelf, consider used Klipsch Heresy I. You can put them on stands, but they're designed to be on the floor. Very dynamic, don't need more than a few watts.
I have looked at the Heresy, it had been previously suggested.
Just a little on the large side for my liking.

No brainer.  You talk about plenty of horses to drive.  Does this include a sub out on a preamp?  Just add a sub for more throw and keep the Monitor Audio speakers.  More dynamics and bigger sound overall.

Really, FM, cassette, how audiophile do you need to get?