Quicksilver is one of the best examples of performance to price ratio out there. If you don't care that it is very plain and without bling you will be rewarded with great sound.
I had a pair of Mid Mono for about 9 years and for what they cost new, you really have to wonder what beats them in their respective price range. Not much. They are some of the best values in audio , regardless of price.
Even if I had stupid money, I would blow it all on fast cars not $40k amps and every thing else needed to go with them