Very well put. That's actually another reason why I would not spring for the GS4, with release schedules being roughly as they have been in the past, the next Nexus will be released a few months after the stock GS4. Combine that with I don't see anything compelling that the GS4 has over the Nexus, and I have very little reason to get the GS4.
As a point of reference, I currently have a iPhone 5, GS3, NEXUS 4, HTC One & GS4.
If I've learned but one priceless fact, it's that there's absolutely no substitute for buying a phone, using it for at least four to six weeks as ones primary smartphone, and then evaluating it. Anything less is to cheat oneself out of what might be the very best phone for you. Only you can decide after fairly evaluating one firsthand.
Here's an example. I happen to think that other than its tiny size, the iPhone display is excellent. The GS3's display is better than I expected, and actually quite good. Yet second for my preferences to the iPhone 5, but still ahead due to its larger more usable size.
When I first booted the GS4, quite honestly I was blown away at how much better its display is.
Backed up by some of the long detailed reviews, they explained why. I regret not capturing the link. Anyway, in this case the last thing I expected was such a huge improvement, something you've got to see to believe.
Then there's Touchwiz. A much maligned feature. Don't get me wrong I'm not advocating for any brand or model of phone, I'm simply sharing my experiences. I have no problem with Touchwiz, and certainly don't hate it.
Yet I prefer Nexus phones because they're unlocked & I have the freedom to install the very latest version of Android the very moment it's released.
Frankly Android 4.2 that's installed on my GS4, does everything I need and more. I can easily enjoy it without rooting or modding it. Just like I found I preferred OS X 10.6.8 better than Lion, so I skipped it. Once the second rev of Mountain Lion was released I migrated to that.
At this juncture I'm so happy with the GS4, I may not bother with the upcoming GS4-Google Edition.