ilusion, I don't think Ike stuff breaks more often than anything else (I haven't had anything break on my setup, though I've only had it six months, other than breaking the focus light bulb in my DS125 when I dropped the strobe - can't really consider that Ike's fault!); for me, the customer service has been in the form of quick and complete answers to my many questions as I dug through figuring out everything I'd need and how it would all fit together.
I migrated from a Canon S230 in the Canon housing to the Digital Rebel in an Ikelite housing with one DS125 strobe and the manual controller; I'll probably get a second DS125 soon. I had some of the same concerns as you do - particularly the loss of the LCD viewfinder. My thoughts, after diving with this setup for 6 months-
1) I use the kit lens when diving, and although it doesn't do true macro (it goes to about 3:1 ratio without accounting for the dome port) it can do pretty good close-ups, and certainly goes pretty wide.
2) The viewfinder is a pain. It's small, even with the magnifier in the Ikelite housing, and you have to get your mask pretty close to the camera. Even so, I've adapted pretty quickly, and it is better for focusing and framing - and the lack of any shutter lag is INCREDIBLE (though I think the 8080 has a low shutter lag for a P&S?).
3) The DS125 is a kick-ass strobe. I can't begin to tell you how much it's done for my pictures - so much I want a second one (for wide-angle and more even lighting), risking the wrath of my wife who is quitting her job this week.
It is SO much better at avoiding backscatter, which is very important here in the murky waters of Puget Sound.
4) RAW is really important for me for correcting exposure problems. I leave the camera in raw at all times.
5) I'm excited by eTTL, but I've been impressed with how quickly I got used to shooting in manual mode underwater. Particularly with the manual controller right there to adjust strobe power, it's pretty simple, and you do get instant feedback.
6) Even with just one camera (okay, I still take the S230 along, but it slips in a pocket), I'm carrying a lot of camera and dive gear along on trips. I shudder to think of taking another full-sized camera along.
7) The setup as a whole is MUCH bigger and heavier out of the water. I don't mind, since I love taking pictures, but it's not like you're gonna tuck a housed Rebel with a strobe in a BCD pocket.
I keep saying at some point I'm going to stop taking the Rebel on every dive, but it hasn't happened yet (except when I'm assisting with classes).
Finally, I wouldn't shut out the idea that if you stick with housing the Rebel, you can swap lenses later on to upgrade your lens quality and expand your repertoire, and you only have to buy the lens and a new port. I'm waiting for my Canon 100mm macro lens to show up in the post (it's in Pennsylvania today! 1/3 of the way here!), and all I'll need to get 1:1 macro and a super-sharp lens underwater is a ~$100 port for it, not a new camera and new housing.
And the Aquatica and other aluminum housings are quite nice - but I do personally like being able to see inside my housing, and make sure there's no water seeping in. I had a thimbleful-sized leak in my old Canon housing, so I'm paranoid about partial floods.
All in all, I wouldn't go back on my decision for the world. I love the setup.