Ah sorry I forgot to show male groups some love too in my previous reply
>>3 lol.
Honestly I'd recommend JRock over Jpop for male groups but let's see, how about Arashi 'Endless Game' or Kis-MyFt2 'Shake it up'.
Oh and I really like this co-ed group called AAA. '恋音と雨空' has a lot of views on youtube.