If it sounds "pretty good right now" enjoy it while it lasts for you.
As far as bang-for-buck, bi-amping old ADS's is really overkill, and new speakers would be my first choice.
It sounds like 5.1 is what you're looking at, so first matching of timbres is important, and while I've been a fan of ADS for a long time, for the money you'll put out for the amps you mention, you can get one heck of a speaker upgrade - a whole set of PSB's (Bronze or Gold + C5 + Stratus mini rears would be very nice), Pinnacles, Paradigms, Totems or ??. For about $2k for a whole package, there are some rather nice choices, and you have a decent sub already.
Also, you mention Martin Logans - I have the complete set-up - SL3's, Cinema and Aerius i's and two Revel B15's, and the ML's they're at their best for music, theater is better with dynamic speakers.
But in any case, for around $3k you could get an 4 x Aerius + Cinema setup, which would be light years ahead of where you're at now, but the Pioneer would be sucking wind trying to power them.
Get
As far as bang-for-buck, bi-amping old ADS's is really overkill, and new speakers would be my first choice.
It sounds like 5.1 is what you're looking at, so first matching of timbres is important, and while I've been a fan of ADS for a long time, for the money you'll put out for the amps you mention, you can get one heck of a speaker upgrade - a whole set of PSB's (Bronze or Gold + C5 + Stratus mini rears would be very nice), Pinnacles, Paradigms, Totems or ??. For about $2k for a whole package, there are some rather nice choices, and you have a decent sub already.
Also, you mention Martin Logans - I have the complete set-up - SL3's, Cinema and Aerius i's and two Revel B15's, and the ML's they're at their best for music, theater is better with dynamic speakers.
But in any case, for around $3k you could get an 4 x Aerius + Cinema setup, which would be light years ahead of where you're at now, but the Pioneer would be sucking wind trying to power them.
Get