I've dove the Speigle about a dozen times. My experience is that you will get about 25-30 minutes of bottom time on an AL80 unless you are super easy on air. On most of my dives there was a decidedly strong current till you got down about 50 feet, then it settled down. I have also found that even with a one hour SI you'll need some extra safety stop time on the second dive. I've dove this ship with Horizon at Key Largo, Conch Republic, and Florida Keys Divers at Tavernier. This dive can be a fun dive and a dangerous dive. Several people have died in this wreck over the last few years by going inside without the correct preperation. One group of supposedly experienced ship divers from NJ were wiped out about three years ago when they didn't come out. It is one of my favorite dives along with the Duane and Bibb. On down the road, at Islamorada, Keys Dives goes out on the Eagle quite often. This is a nice dive also, about 125 feet to the sand. Might want to try that one while you are nearby.