I have been using the EML 300B 2.5 for about a year now, on and off in my Stratus. I envy you Stellaris owners. I find it to be a very musical tube. It's very rich sounding and, imo, a more refined sound than the Sophia 300B 2.5. I'm listening through ZFM Verite and very enjoyable - in the Stratus. Interestingly, in my Stratus, I find the Psvane ACME to be be very airy but also a little thin compared to the EML 2A3 mesh or the 300B 2.5 which is contrary to what some others hear on the Stellaris. About that EML warranty - one of my 300B 25 tubes has developed a low level sputtering noise and it should be under warranty. I purchased from one of their dealers - you can't buy direct from EML - and they were quick to mention that they don't deal with warranty issues - deal with EML. Well, after a bit of frustration trying to contact EML for warranty problem I went back to the selling dealer (RAM Tube works) who told me I needed to contact the distributor (JAC Music, Germany). There is virtually no way to find this information on their website. I sent JAC an email earlier this week and have yet to hear back. I don't know if it will be a problem or not but anyone purchasing EML tubes might want to purchase from JAC Music and quiz them about the mechanics of a warranty claim. It isn't all that clear. BUT, I sure do love the tubes. And, while it is called a 300B tube, isn't it really just a 2A3 tube made differently from other 2A3 tubes? And finally, sorry to be so long winded - on the website the new EML Special Edition 2A3 is $900 for pair.