The Mustang GT's are some of the best cars Ford or any other car maker has ever built. The engine is good for a lot of power, and has shown no durability issues-no it won't last forever, but I'd snap one up with anything under 100K miles and not hesitate to put the next 100K on it.
As to the forum, welcome and stick around either way, there are some good folks here, even if it seems slow at times-I believe that is because we are actually driving and working on our own cars instead of talking about it!