Pup100 - Nice handling, only 2 seats but vastly underpowered for aeros
Pup150 - Still a little underpowered, lovely to fly and will take 3 adults (or 4 light ones if you only want to go once round the circuit!) or 2 adults and a couple of small kids (I am involved in a possible group at Popham or Goodwood - PM me if interested).
Bulldog - a lot more power but a heavier aircraft, gives it a more solid feel than the Pup.
Whichever you fly I am sure you will enjoy it
much more than a Piper or Cessna, just allow a lot of height if it is the Pup100.