Well for now I'm dealing with what I have...I must admit this Denon AVR-1613's HP output is quite powerful....wow. I haven't used my FiiO E9 since getting it. Probably gonna sell it if anyone's interested, I've owned it since new.
I've been listening and enjoying my JVC HA-RX700 for weeks now. That and my half bad cable Iron Buds (my favorite basshead and overall earbuds ever! Wish the owners would get their sh!t together!).
The JVC's have been good...and the Denon really brought them out...but they also needed more EQ-ing than ever for bass...I'm a bass head..I want as much deep and impact as I can get without distorting the mids/treble. I'll happily EQ what I can to make it sound good to my ears.
Well I just hooked up my liked but meh JVC HA-DX 3's which while I've always liked I've never loved...and with the Denon.............WOW! Amazing...the bass is looooow and heavy and the mids and hi's are so much crisper. It's a great mix. There's less impact but I'm getting over it. I think I found the DX'3's match after owning them for years. I wish they were a little more bass heavy still but man do they sound good regardless. They hit the low factor I wish the RX700's would. For once in recent years I can confidently say I'm happy I still own these! Though they have that sound in the low end like they should do more but they can't...that's been their biggest downfall. But this is by far the most they've been able to put out bass-wise without distortion since I've owned them.
We'll see. I have read the A900X are worth a serious look too. The Phillips X1 would be an option if I were single in my own place. I have read about the DT770/80's and they are currently my top choice.