What's Next

Many thanks. Appreciated.
Agree, the final decision will come from somewhere between my two ears but most importantly from the how do I FEEL when I hear them playing the music I like. I am listening to Ernest Rangling - Soulful Moments as I type and the Lyngdorf/AR9 combination is close to heaven, but my speakers are old and want to tip my toes into more modern speakers. Have had B&W-703/803, KEF Ref, Gershman, TDL, SF Cremona, JBL Ti, along the way. The demo of the 300 did not leave me with the feeling I thought they would stir but only with the feeling that my AR9's are great.
I guess I would wait for the PL500 to arrive this week to go back for a session armed with the same test discs and my Amplifier. I dont think i would struggle with the Bass/Mid, just the really top end(Tweeter) - I listen to all genres and some caribbean music need the really high top end to do them justice which the 300 did not give me. I really hope the voicing is better in the 500.
Thanks....

Hi Riced1,
Curious what you ended up doing with the PL500. I am in the UK abd have had great pleasure with my Modified AR9 speakers being driven by a full Musical Fidelity KW1000 system. I have since moved to the Lyngdorf TDAi3400 all in one box and is loving the speakers even more. I have the itch and demo'ed a pair of PL300 the left me rather disappointed in their lack of detail and top end drive. Seems the tweeters are attenuated to such levels that the sound sounded rather dark. I only opted to hear the 300 at the 500 did not arrive in time for the demo and I was led to believe the 300 and 500 have similar character???
I now await the arrival of the PL500 at the dealer and I am taking my Lyngdorf to the demo as the Naim units that they were driving the PL300 did not do them any justice either. 
The good thing about the Lyngdorf is the roomperfect and ability to trim the bass and treble so hoping this might help with the Monitor Audio voicing???
I like the look of the pl500 but still in doubt about its sonics compared to my AR9 or even a pair of Dynaudio Confidence C4..... 
Is this the same issue you have experience with your PL500 that you are describing as "clarity or detail"? The 500 have fallen in prices here, drastically and I was keen to buy a pair. Am I on route to a big mistake???

My system 1 uses Musical fidelity KWP/KW1000 setup with a Linn Majik streamer and nuforce DAC for CD. Also AAphono for vinyl. AR9 speakers. System 2 is Lyngdorf 3400 driving JBL Ti5000. Schmitt Mani for vinyl.