This is my first attempt at DIY speakers and I'm pretty darn pleased with how they turned out! What I've built is a set of standard A/V-3's using the cabinet design from GR. I added the top and bottom plates onto them to mimic Onix Rockets but other than that it's stock. I calculated that I have about $600 invested in total including all the upgrades GR has except the blackhole 5 damping material which would have been another $100 or so. I haven't really sat down to listen to them yet as I was too busy jumping for joy that my crossover actually works (I can't solder to save my life) Take a look at mikebillings.com (sorry, had to put spaces in because I can't post links yet) and let me know what you think. Many thanks to all the people who have ever posted in these forums - I used pretty much every bit of advice doing this project!