I'm no expert, so here's my : I've gotten my best 60ft time running M/T drag radials; 1.445 on a reasonably well prepped track, a couple of weeks later at a different track, not as well prepped my 60ft fell off to 1.8**. When Drag Radials start to spin (at least M/T's)they don't recover and it feels like your on ice; slicks may not bite as hard, though they will be more consistent.

How hard do you want to race, and how much do you want to win?