Hello Grado FANS! Here is a video I just made! Happy 4TH of July!
Some prefer the (G) cushions on the 325's, but most leave the stock (L) cushions on.
It depends on what you like best as far as sound/comfort.
You may be able to grab a used 225i for the $165 that you have saved up.
I would say the 225e would be worth the step up....but the 60e and 80e would also be great cans at a great value.
You really can not go wrong with any of the three you mention....the sr60...sr80...or sr225