I don't doubt what Command said, but keep in mind that the 883 isn't slow, it's just slow compared to other 900cc bikes. Or even 600cc sport bikes, but it's not meant to be a sport bike.
Engines being "disposable"? I don't care if a bona fide HD mechanic said that, I find that very hard to believe. Cheap Briggs and Stratton lawnmower engine are disposable, but only because the have aluminum cylinderwalls and no rod bearings and you can buy a new one for the same price of overhauling a used one. That certainly doesn't describe the 883 engine. I suspect the mechanic that said it was one of those HD guys that hate Sportsters....mainly because the Sportster is faster than his personal big twin. As far as the wearing the engine out, you're going to have to ride it very hard for a lot of miles to actually "wear" it out.
I met a gal on her 883 a while back. The bike was very well finished with the typical HD high quality chrome and paint job. She had HD hard saddlebags and they fit perfectly on the bike and had a wonderful finish that perfectly matched the bike. Top of the line to be sure.
As far as other people's opinions of the 883, dismiss them...as well as my own. If you like the bike and it will do what you expect of it, then go for it. If it won't do it, then find a bike that will regardless of what brand or size it is.
