If you are gonna go with the Icon, I wouldn't buy it new - go with a used one from Swappa, or ebay - its a great upgrade on your 928 (
Buy Nokia Lumia Icon (Verizon) in US > Swappa) 220$ is an amazing price - I bought mine for 599$ on release. I have the Icon, and its a really amazing phone - beats the pants off my wifes iphone 5s - the 6 is debatable, but its very close. I do love the feel of the 6, its so skinny, and just feels good in the hand - but the Icon can compete on any level with the new iPhone. Gaming, multitasking, camera, etc......and its only going to get better with the impending (I know, its been impending for months now) Denim update. As far as the Apple App store - you know the difference - if you have gotten by with your 928, your not really missing that much. Sure there are some banking apps, and what not, but most of the games are there, and, well, your a fellow WP user, I don't really need to go there. Iphone is nice - but its lack of file support, locked down eco-system, iTunes/iCloud limiting nature is a complete turn off for me. The only reason I let my wife get the iphone 5s, was because its a stabile OS, and she wanted a small screen, and Android was just not cutting it - crash/lag/root/throw into oncoming traffic - couldn't deal with it anymore (which is why I find myself on WP in the first place).
If im you - I wait till W10..........if you cannot wait, the Icon defanitely still competes with the other flagships out there.