Personally, I'd go for learning in the Cessnas. You are joining a world made up mainly from modern aircraft with modern systems and modern Air Trafic Control. Getting a PPL is hard work, but the grounding you'll get in a good Cessna club will see you right. The Tiger would be good fun, but it's limited to grass strips on airfields that can cope with an unbraked, tailskid equipped machine, and there's not many of those about. You'll also find the PPL a lot easier in the Cessna as the aircraft requires less stick-and-rudder skill to fly it, so you'll have more time and brain power available to think. When you have your PPL, go for differences training and then convert to the Tiger.
Good Luck,
A