I don't agree that the Lab 9's will "age" faster than the 5's. I might be in the minority here but the 9's were love at first sight, while the 5's looked good only after I learnt the technical prowess behind them, and I still can't get used to the 3's. The thing is that the 9's are a very flowing and unified shape, while the 3's and 5's have various appendages - the ALT tweeter on top of the 3's looking especially unattractive. Simpler, balanced designs usually have longer staying power.
The white Lab 9's in the newest Beo magazine are absolutely breathtaking.
Leo