It won't really matter to the search engine if you do or don't. I feel it's easier to read without the tags, but that's just me. As long as you stick to the format, do whatever makes you feel good.
Subject: media maker, rated speed, burn speed
1) drive model, firmware, burn size
2) ADIP info
3) comments
4) scan results
Note: when opening a new thread, you have to go back in and change the post subject after setting the thread subject, so that it states the speeds.