Personally, I think 14s would look too small. The 15" used on Sporting and HGT can use 185-55-15 or 195-45-15. Your suggested tyres are not a lot different side wall height though they are smaller diameter.
Personally I think 16" wheels with not too much space between spokes will look best but tyres are costly for 16" wheels. 17s I think look too tall and skinny with very few actually suiting the car.
For the drop it is best to get some coilover dampers. That way you can adjust the drop to what suits you best and you get new dampers thrown in, which will probably be needed anyway.