I've finally acquired an HD-audio capable receiver and have been tinkering with the set-up the past 3 days.
I swear sa deities of sound, but mas mabangis pa rin talaga ang sound ng aking DSP-AX1. Adjective to describe the difference, "more dense" ang sound coming from the AX1 than my new Onkyo1008 - punong-puno talaga. I really didnt know what to expect when I finally switched the speakers but I was even more amazed at the AX1 in the end.
In any case, I like and enjoy the rich gadgetry and very cool functions of current-day AVRs - and finally, I saw blue "HD" lights instead of dim yellow/green indications. hehehe. I bought the Onkyo1008 because it truly sounded nice during my 4 weekends of testings at Labi Main Store in Ikebukuro, Tokyo. The 1008 is an upper mid-range receiver pero iba nga pala talaga ang sound quality and signature kapag flagship model kahit gaano kaluma, and kapag pinagtabi mo ang flagship sa iba.
Bottom line, keep your A1, A2, AX1, AX2 til the end of time unless you can afford something like the Z7, Z9 or Z11.