I just did an A/B test between the CW Exciter vrs the Aphex Exciter...I paired them both with the CA-2A.
My favorite is the Aphex with the CA-2A.
I did well by buying it while it was on sale, now it's listed for $299 again.
I have a long history with Aphex. I dj'ed for 2 years, and had an Aphex Aural Exciter with Big Bottom in my dj rig. I A/B 'ed it many times and always chose the Aphex over no effect. My dj rig sounded fabulous and I played to a packed house for two year. Got lot's of compliments on the sound quality. It never failed me, not even once, it always sounded great on all my music. So when I saw the Vintage Aphex Aural Exciter plug-in on sale I jumped on it.