I have only had an Alpine HU for like 2 months, I got one of the lower end models 9827, but am EXTREMELY satisfied. I wish I would've spent a little more to purchase a higher end model.
I use to have the highest rated Pioneer Premier 900r (well highest rated when i bought it) And yeah it had cool features, but the Sound Quality was NOT any better than my cheap Alpine, if anything, i think my Alpine might sound better. Makes me wonder how a higher rated Alpine might sound?
PLUS, i think you will get sick of those stupid graphics after a while. I know i was sick of them after the first year.