I've been using a Mac Mini/Metacorder/MOTU Traveller setup since 2005 as my main multitrack recorder. The Mini is now mounted in a rack mounted drawer with a Carnetix P1900 DC/DC regulator to run it on 12VDC. I'm still using my original non-intel Mini. It has never failed. (Although I am getting ready to replace it with a new one.) They do run hot so on occasion, when there is a very high ambient temperature, I have had to stick a cold bottle of water in the drawer to keep things cool. The only issue I've had is with the Metacorder dongle getting direct light and/or it and getting too hot...the program can crash. Do know that you must use powered hubs if you are planning to run multiple HDDs and A DVD burner. Learned that one the hard way when the computer stopped "seeing" the interface right before a take once. Although I also track to my Cantar X-1, I only burn a 2 track mix back up with it to send to telecine.
Other than that, it is a remarkably robust system that I have used to master every show I've done over the last 7 years. It is great to have the ability to record a virtually unlimited number of tracks when needed. It's perfect if you are using an 01V. I tested a setup using a Macbook/Metacorder/M-Audio Firewire 2626 with the dual ADAT card and was able to record 16 tracks continuously for hours with no problems. Unfortunately, the show cancelled before we started production so I didn't get to use it in a real production setting but the tests went great.
Metacorder is an awesome program. I highly recommend it. I am not so familiar with Boom but several friends of mine swear by it as well so I am sure it would suit your needs just fine too.