Speakers for my b9

[Tikki]

I want new speakers in my b9 van. 
Front door, and maybe dash/tweeters

does any one have a good tip for type of speakers/kit. 

Do I need to mount the lowpass filter? or could I just run the speakers from the original wiring loom

I had focal in my golf. and the sound was good. but they are so expencive
Looking at these. [font='Droid Sans', ​sans-serif]Alpine SPG-17CS[/font]

[font='Droid Sans', ​sans-serif]any suggestions?[/font]