Actually, as a potential dive buddy on the Channel Islands trip, Mike, I have to disagree with Shasta_man. You're going to appreciate extending your bottom time by approx. 20% by getting the nitrox cert. 6 dives a day, you need to watch your NDLs and O2 sat carefully, make sure you have a good nitrox compatible computer to take with you.
I'm considering retaking my drysuit class to get my cert so I can rent a drysuit for the trip. Water temp isn't gonna be much different, but after you get out, I'm thinking I would probably appreciate being dry.
Keep diving until then, you know I'm available often to get out diving with you.
After Nitrox I will definitely be taking a break from classes and just enjoying just diving for a few months or longer. I had a chance to talk with a few people on our boat trip and everyone was very adamant that while diving wet in the Channel islands is possible, its probably not a great idea.
I dove with two heat packs in my wet suit going full blast and at 86 ft I was still shivering. I'm partial to agree with that and as a result, I've been doing a good deal of research into a dry suit. I'll probably be picking one up in the next couple of weeks to give me time to get used to it.
Not to mention I'm doing the DUI DOG DEMO Days this weekend!