I was annoyed with the pen but impressed with the speed of the i7.What a turn around for you! I remember you being pretty down on the SP3 not too long ago. Seems you like yours a lot now.
The pen is a bit fussy. I have to use OneNote Modern in full screen as the palm rejection doesn't work very well and being left handed, the pages are down the left. I was showing a customer the writing last night and I had several times I got shunted out of the page I wanted. This doesn't happen on the SP2 so now I'm just using full screen.
The performance though of the i7 is just great and that was the choice I ended up making and I'm keeping this one.
Both i7 models I've got have had no flaws at all.
I'm happy now but no device is perfect and I would prefer a passive pen like on the SP2 but I imagine the same pen will be used on the SP4 when it comes out.