Th Flair Pup is an excellent choice for a project that builds beautifully and flie just as well, will give you many years of good service. I have built ttwo of them..the last one lasted 10 years before pilot error set in one grey sleepy morning.
The one thing I would recommend is that you deviate from the plans on thePup and install one servo in each lower wing (I insead of one in the center driving two ailerones)This will give more flexibility in fine tuning your differential and helping coordinate flying curves with your rudder.
My other recommendation would be to install an OS 70 ( 11.5 cc) or Laser 70..or similar Magnum or Saito...This will give you a bit more power for aerobatic manoevers but still fly in a scale like fashion more or less. The problem with rolling the Pup ,as Abu mentions, has never been a problem with mine..and I assume its because of this extra oomph factor. Unfortunately this size engine will protrude a outside beyond the cowling, but not in an ugly way...my opinion. At some later point you can build a scale landing gear when your skills and tools and expertise improve....you picked the right plane..take your time and enjoy building as much as flying !
Oh, one other area with all biplanes is to be very careful when buiding the Cabane section...this can cause you no end of grief later if it is not set up perfectly square to building board from all angles.