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Im gonna get rite to the point. You mite wanna note any explanation will prolly need to be for someone without that much knowledge on audio equipment. (Also, when asking numurous questions I tend to get less answers, please help a stupid kid out) THANKS so much!

6.5 Alpine type R/S, will this fit well, any modifications? and what size spacer will I need?
Should I go with an Alpine 5.25 instead for the front? Will this make it easier if I go even smaller, like no mod needed? Spacer size the same?

Rear speaker I want to keep my thin bar that goes from one end to the other right under my two rear speakers so my trunk doesnt close on it's own (it helps keep trunk open). A friend of mine with a 2k1 civic has 6x9 and the bar doesnt fit anymore. Should I go a smaller model? will this prevent it? I hear a lot of crap from ppl that 6x9's are hard. Im thinking of the Alpine 6x9, hear anything about this? What size is ideal for the rear speakers, speaker spacer size too? Going smaller pros/cons??. If u wanna tell me a certain speaker Im thinking of going all Alpine.

Is there any way in hooking the tweets up when the front 2 and rear 2 speakers are hooked to my head unit? Im thinking of the Alpine 7893, but is there a way or do ppl jus leave it there?

Thanks a lot guys!
Lou-