Took the plunge, and sent away impressions for a pair of custom IEMs from InEarz. Excited! I had decided earlier this year to go custom. Have done IEM before, but with varying quality of earbuds. In all cases, I always lost the seal almost immediately - not so bad for singing, sucks for bass. I'd been set on 1964 Qi, but they apparently don't do them anymore. The new line/s, while great, I'm sure, were just a little out of my desired price range. So did some sleuthing around. InEarz is apparently well-known for upgrading existing buds, but also make their own. I've opted for the P450; 4 drivers, high/mid/bass x2. Impressions were quick and easy, cost $65. P450s start at $475. I went plain with the colors, so no extra charge there. They have an option for an ambient port, but I got the impression they don't recommend it. Also mentioned it curbs some low end, so that was a big 'no'. They also have an option for soft canals, but only up to the three-driver model. Lady on the phone says they very rarely, if ever, get complaints about the acrylic. I'm a weekend warrior, so not a huge concern in any event. I did opt for the recessed jacks. Anything to assure the connection. So, in total - 475 - IEMs 20 - recessed socket 65 - molds 10 - shipping ---- $570 for custom 4-driver, extra bass IEMs. You can go nuts with the colors and options, of course. Mailed in today. They're just a state over from me, so should start brewing soon. I couldn't find much info on these guys here, and there's never enough details of experience with IEM around here. Always a leap of faith, but always seems to be well worth it. Stay tuned!