I got some good deal on Tesla E88CC and they arrived during the time my CSP-2 was out. Swapping between Jan Philips 6922 and I like what I heard so far. Tesla sounded smoother but still retained good details. Philips 6922 on the other hand has more "hard" sounding, which was pleasing for some instrument music but may be slightly harsh for some bright recording. Very good complement for my music.
I also got some 5Y3GT but did not strike me with any apparent SQ change comparing to Raytheon 5U4G. But there's too much change for today. Maybe the difference will surface up later.