Should I buy JR Pass or JR East Pass?

Itinerary:

May 5
Arrival at Narita Airport at 4:30 pm
Look around Shinjuku

May 6
Tokyo

May 7
Shibazakura Festival (With a Tour includes transpo already)

May 8-10
Nikko/ Kinugawa

May 11
Hakone Day Tour

May 12
Ikebukuro/Ueno

May 13
Flight back

I have several options but I don't know which makes sense. >_<

I can buy the Narita Express + SUICA and then buy JR East (5 flexible days). Does that mean I get to use this for nonconsecutive days? Also, I plan to buy Hakone Free Pass (because that will let me try all the transportations if I plan to do the tourist main loop route for Hakone).

To get around Nikko/Kinugawa, should I just use SUICA or should I buy All Nikko Free Pass (4 days)? But wouldn't that be overlapping with my JR East Pass? I seem to be buying a lot of passes, no? Also, if I want to upgrade to Romance car (for Hakone) and Spacia (for Nikko), can I use JR East Pass or do I have to pay extra fees? I keep searching but get different answers, I don't know which info is the latest and most reliable...

Thanks for all the help!