Depending on what games you like the answer will change. Seeing as you had a 360 and liked it i would think that the PS3 has more exclusives than the Wii-U that would take your fancy.
For me it would be like
Wii Games (Make sure to have a SDTV to had because these games loop pretty bad on a HD screen)
Mario Kart Wii
Smash bros brawl (I did not like it but if I dont list it I will be killed)
Mario Galaxy (did not like it but will get killed if not mentioned)
Mario Galaxy 2 (did not play it because i did not like the first. has to be listed because i will get killed)
New Super Mario Bros. Wii
Twilight Princess
Donkey Kong Country Returns
Skyward Sword
Disney Epic mickey
Sonic secret Rings
Resident Evil 4
Sonic Colours
Red steel
Red steel 2
The last story
silent hill shattered memories
Naruto Fighting games
fragile dreams farewell ruins of the moon (it was a bit slow but still decent)
Epic Mickey (the first is wii exclusive)
One Piece Unlimited Cruise 2
One piece unlimited Cruise 1
Monster Hunter tri
Xenoblade Chronicles
Wii-U games
New super Mario Bros. U
Super Mario 3D World
New Super Luigi U
Wind Waker (I hate this Zelda but you said you like them)
Lego City undercover
Donkey Kong tropical Freeze
Obviously you have the games that are not released yet:
Zelda U
Kart U
Smash bros U
Other ninty games
PS3 pretty much has all the AAA games its going to get
Uncharted 1
Uncharted 2
Uncharted 3
The Last of Us
Jak n Daxter Collection
infamous 1 (it was ok but not what it was hyped up to be)
infamous 2
Killzone 2
Killzone 3 (This game was not as good as number 2)
God of War 3
God of War Collection
God of War: accession
Gran Turismo 6 (you wont need 5)
Metal Gear Solid 4
LittlebigPlanet 1
LittleBigPlanet 2
LittleBigPlanet Karting
Resistance 1
Resistance 3 (Don’t play number 2, meh)
Yakuza games
Heavy Rain
Beyond: Two Souls
Demon Souls (First is PS3 Exclusive)
Heavenly Sword
Siren: Blood Curse
Naruto fighting games
Tales of Symphonia Chronicles (COLLECTION of symphonia tales games)
Tales of Xillia
Tales of Graces f
White Knight Chronicles
White Knight Chronicles 2
Ni no Kuni: Wrath of the White Witch
Valkyria Chronicles
Kingdom Hearts HD
One Piece Pirate Musou
One piece Pirate Warriors
One piece Pirate Warriors 2
3d-dot games heroes. Enjoyed this but you might not like it.
Twisted Metal
Disgaea games
Team ico collection
Sly Cooper: Thieves in Time
Sly Collection
Ratchet n Clank collection
Ratchet n Clank games (Crack in time is a gem)
Atelier Rorona
Persona games
Tales of Xillia 2 when it comes to the west
MLB: The Show (If you like baseball, I don’t play them but I always here good things)
Obviously the PS3 has all the 3rd parties 360 has. Maybe you have missed a good few games that were on the 360 that you never managed to pic up.
Also the PSN games. Wiiware is pretty crappy.
Both good options. I would pic a PS3 personally but I already have a Wii so i know what to expect from it from BC is no big issue in my opinion.
Nobody's perfect. I aint nobody!!!
Killzone 2. its not a fps. it a FIRST PERSON WAR SIMULATOR!!!! ..The true PLAYSTATION 3 launch date and market dominations is SEP 1st 
