Why and when should I switch to a grand piano from an upright?

Question:

Why and when should I switch to a grand piano from an upright?

Is it essential for learning piano further (meaning the touch etc.)? Does it make you a better and more sensitive player? And is it easier to play other pianos after playing a grand? I've played for 10 years now. I have a not-so-good beginner upright and I feel it's slowing down my progress. I'm thinking of a second-hand yamaha c2 or c3. Thanks.

Best Answer - Chosen by Asker: Coming from a guitarist who waited 15 years to get the guitar he really wanted (an American Fender Stratocaster), I would wait until I was playing a lot. Almost like professionally. I play lead guitar for my church band and another gospel group. That is the benchmark that I used.

http://www.handlethetruth.net