If I thought I could get away with mounting my tweeters in the a pillars, I'd definitely have a go, but it looks like more trouble than it's worth!
When I was experimenting with locations, it did sound good with the tweets blu-tacked to the base of the a pillars, but the mirror backings aren't that far away. It's a shame that the trims aren't a little deeper, otherwise I'd try flush mounting. I've got some JBL tweets in there at the moment, but I may be upgrading soon, so I'll wait until everything is finished, then get some pics up.
AZIM, I take it you have the relavent active crossovers if you're going for a 3-way front end? I'm having enough trouble with 2-way!
