Verified answer

Silversun Pickups... fricking excellent!

A band I found a few months ago is Yes Giantess

their an Electropop/Synthpop band, amazingly similar to Passion Pit

Yes Giantess have an album Siren and their best songs are:

You Were Young

Tuff 'n Stuff

Can't Help It

No Reason

Up And Down

Another band is The Naked & Famous

again, so similar to Passion Pit

check out Young Blood and All Of This by them

Come Around by Tim and Jean is also an Indie Electropop song, but a little lo-fi

Other songs and artists in the similar genre are:

Keep It Cool (Bo Flex Remix) - US Royalty

Boy Toy - Starfucker

Animal - Miike Snow

Jackson's Last Stand - Ou Est Le Swimming Pool

ONE - Yeasayer

Lights And Music - Cut Copy

M.A.G.I.C - The Sound of Arrows

Bulletproof - La Roux

Orange Shirt - Discovery

Brow Beaten - Silver Columns

Beaches and Friends (Hey Champ Remix) - French Horn Rebellion

Gold In The Fire - Monarchy

You Came Out - We Have Band

I Look To You (feat. Kimbra) - Miami Horror

Ribbons Of Light - Kids Of 88

I love Passion Pit! these aren't all necessarily electronic, but definitely check them out because I think you would like them:

MGMT

Pheonix

CFCF

Two Door Cinema Club

Sleigh Bells

Cut Copy

Hot Chip

MSTRKRFT

Neon Indian

Pantha du Prince

GAMES

Miike Snow

!!!

Gang Gang Dance

Memory Tapes

also I'm seconding Ratatat and LCD Soundsystem

plus: go to rcrdlbl.com and look up passion pit - they have some good remixes that are free!

MGMT

Tokyo Police Club

Hungry Kids of Hungary

Yeasayer

Vampire Weekend

Foals

Bloc Party

Local Natives

Florence+The Machine

Animal Collective

Ratatat

Neon Indian

LCD Soundsystem

Delorean

Had to look Passion Pit up on youtube - glad I did. It's an ace tune.

I suggest you take a look at Empire of the Sun - Walking on a dream, and Hurts - Better than love. Both quality bands.

http://www.youtube.com/watch?v=eimgRedLkkU&ob=av2e

http://www.youtube.com/watch?v=bn8tBgI1BVQ

The Radio Dept.

Wild Nothing

MGMT

My favorite new band out at the moment is TheGlitchMob

starfucker, mgmt, vampire weekend, crystal castles, tokyo police club, super mash bros, ratatat, small black, pheonix, raleigh moncrief, modest mouse

favorite is "where you belong" by kael alden