My kind of discussion!
I have a relatively extensive collection, my main focus is on Japanese sports saloons and coupes from the 60's - 80's. However I do have a smattering of others, inclusive of some 1:18 Group 5 BMW 320i's, Lancia 037's in rally trim, some road BMW's... basically if it's a 60's - 80's tintop I'm likely to have an interest in it.
Scales include a selection of 1:64 Konami (Japanese brand) highly detailed Japanese car range, a bunch of 1:43 Alfa's which were purchased before I shifted my focus to 1:18, with the bulk being 1:18 Autoart, Kyosho and Minichamps branded items. Latest addition was a series 1 Mazda RX7 road car, the next is likely to be a TA22 Celica road car.
faminz - that GT40 is stunning, Exoto do some fantastic stuff at prices that are generally above my budget/justification.