Best Tweeter for DIY project


I am looking for one of the smoothest, silkiet, and unfatiguing tweeters out there...any suggestions?...Would ribbon tweeter be better?
kasboot
www.zalytron.com, www.northcreekaudio.com for speaker ideas.

www.audioasylum.com under cables. do a search for bob crump and you will find your answer.
If there were a perfect tweeter out there, all speakers would all have it. Try a Scan Speak 2010 for starters.
Isotar tweeter. Its the tweeter used in the Sonus Faber Extremas and costs a hefty $1000.00 each but are incredibly smooth.