If you are going to be an owner, go for the training machine close to you future plane.
If you are going to be on charter, go for the most ordinary planes you can hire all over the world and go for classic cockpit.
Would it change your mind if the glass cockpit plane was cheaper? Others have said learn on whatever is cheapest etc..
I doubt i'll be an owner after i qualify. Renting would be the most likely outcome. From that end i understand i'd be better learning in a PA28 say, but it's a lot more expensive than the PS28s.
Cheers!