Hey guys. I'm looking to add a tubed preamp into my setup. Any input or opinions would be greatly appreciated! My max budget is around the $350 mark. My current setup is: Marantz 6370Q > Marantz 2270 > Marantz HD-880. Right now, I have a Shure V15 Type IV cart, but I plan to swap that for an Ortofon 2M Blue.