The original topic was the EPL-1, to buy or not to buy. I don't think it's reasonable to compare a full on DSLR with the EPL-1. Certainly they are better, but you will spend $4000 on a system, versus say $1600 for an OLY EPL-1 based system.
For me as a long time user of Olympus UW cameras, the EPL-1 made good sense. Picture quality is better than any Point and Shoot Camera, and despite some quibbles, overall it works well. The original Oly Port works with the kit lens only, so for other lenses such as the 50 macro or 9-18 you need other ports. For under $1200, you can buy the basic system: camera, Oly housing, and tray. You'll probably want at least one strobe, another $600-1000. I'm not sure when the IKE housing for it will be available, might even miss this generation so don't hold your breath. You may be able to re-use your AF35 flash and tray if you really want to save money, but a better strobe is probably worthwhile.
This is complicated by the upcoming EPL-1S -- smaller, with improved lens. Personally I don't see any great benefit to the newer camera for underwater use. The good news is the original version will be discounted as it is being discontinued.
As for customer service, I have had nothing but good experiences with Olympus. I need a lot of repairs. I use Canon USA, Nikon USA, and Olympus America as well as third parties for repairs. Canon and Nikon are better, but OLYMPUS gets the job done for me. They are a little slower than Canon for routine repairs, say 14 days versus 7 days in the shop, plus shipping time. All service shops can run short of parts for repairs and that can delay things another month or so. When Olympus cams pass end of service life (4 years after discontinuance), they won't repair them at all and there are few other options (Precision is one). When they can't repair it, Olympus does offer a refurb of some current models at inflated prices, but these seldom are desirable for underwater use. All in all, they do a good job of support.