RE: First low wing / Tail dragger, which do I buy?
As always: ARF or kit? You seem to be looking in a .40 size, so (assuming ARF) there is a lot of fun to be had with models like the Goldberg Hot Stik (whick is a good sport model with a .40 LA or a handful with a TT Pro-46 ). A Sig Somethin Extra would be a great choice and a bit nicer (and costlier). As mentioned earlier the 4-Star is also a good low wing tail-dragger.