Cheese said:
So I'll put my own twist on this discussion.
When I was 40 I purchased a Milwaukee 4" belt sander made by AEG.
When I became 60 I purchased a Festool RO 150.
When I became 70 I purchased a Festool RO 125.
Remember, unless you swap these tools out on a yearly basis, you own them for life...which means you have to deal with them for life unless you sell them to another unsuspecting soul.
Bottom line...that 650HP rat motor you owned in the 70's may not be quite as desireable as the 500HP mouse motor you now own.
Cheese is about 6 years tougher than I am. [smile]
As a couple others have mentioned, my affinity for the Rotex (all 3 of them) stems from their ability to make a surface FLAT. If you use a hard pad and make an effort not to tip the sander, they will do an amazing job for a hand-held tool. Obviously, bigger is better for that application, but you have to balance in other factors unless you have the luxury of being able to have them all.
I am a Swiss Army Knife kind of guy, so the RO-90 with it's detail pad was a no-brainer.