I've found the bigger planes usually handle better, and are easier to see. Yes, there is a bit of a cost difference too, as usual. The build is essentially the same, with of course a little bigger area needed for the bigger plane.

If space is not a prob, and cost is not to much of a prob, I'd go for the bigger bird. Especially if it's your second one, that will be a good kit to go with. You'll learn alot of techniques while building kits. The WOW factor will be a bit greater too with it, and if your getting your trainer down patt, it should be a good transition.

The .40 size planes are nice, real nice, even nicer for those that have space and money constraints, if you dont' have any of these constraints though...get the bigger one would be my vote.