Looking for speakers for my 4W SET amp

I'm looking for some speakers with very high sensitivity for my 4W SET amp.  This is for a 2nd system so I'm not looking to break the bank.  I'm looking into Zu Omen Dirty Weekend, Omega Junior XRS or maybe a DIY project with Audio Nirvana or Lowther drivers.  I've never owned single-driver speakers before and I'm a little nervous to take the plunge.  Any thoughts?

thanks!