You can definitely do it cheaper yourself if you're ok with making your own enclosure without a PCB. It is called the Starving Student after all. That also gives you the option of using the 12AU7 (and similar) tubes - while they might be a little more expensive now, they'll still be available in ten years. Equalizer, thanks for clarifying, I was a little confused. I didn't think that the 19J6-12AU7 conversion was all that easy (as it turns out it isn't) but it makes sense that you can roll the 12_7 series fairly easily.