Your budget limits things.You maybe better looking for a good sub first and going with it until your budget permits a bigger speaker.A room filling big speaker with deep base would be the PSB Gold's (though there are better mids out ther it's boig room fillign speaker with deep bottom end.Stereophile reccomeded class B for years.But used expect to pay $1200.But a gighly musical sub would be the $1200 new $750 used Vandersteen.Not the deepest sub for the bucks but uses m,ultiple drivers that are fast and very pitch accurate.Uses a crossover where they if you hook it up to the spaker oputputs of your amp like they reccomend it responds to the whole ouput of your amp a better sounding way then line level RCA inputs which just low passes signal.You have nice equipment and they deserve better than waht you can get for $500-600.With the sub you can look for better monitors when your budget permits and even folks with decent floorstanders will keep the sub to fill out a big room with the last two octaves that are missing even with a lot of floorstyanders.A decent pair of relatively inexpsive bookshelfs are the B&W 602 used ($600 new $400 used)Youroptions with the sub as a first step would give you bass that your room can support and allow you to look altter for something else as your monitor.I meanwhile they will fill out your Linns.
chazzbo
chazzbo