Indeed.
The hold up on the Arco set is the Xover and the CarAudio flanged Tweeter.
When I first got the Arbiter TM set, I dropped the tweeters in my truck to take a listen to them... let's just say I decided they were going to stay there... I was so satisfied they're not coming back out.
So, I currently have to the HomeAudio flanged Custom Vifa XT25 tweeter from the Arbiter set in my truck paired with my RE XXX6.5's
The tweeters are simply amazing, like WOW... rediculously amazing. They have the ability to match up low with my XXX6.5's... I mean they play flat to 800hz (not like I have them set that low... but they can).
I love them. I'm in the process of designing/building a 5.1 setup, the mains consisting of the Arbiter TM, surrounds consisting of the poly mid and a different vifa tweeter, and the center channel consisting of a pair of CSS 4.5's
I've dropped the poly mids in my car and I like them. But I was more impressed with the tweeter.
nG