Upgrade suggestions

[HDNitehawk]

Yes there is an advantage with FF over Crop. For most models less noise at high ISO. With a FF you have more ability to take advantage of your DOF and Bokeh. For landscape work it is much better. The AF systemem of the current offerings will be a huge bump up. The exclusion would be the 6D which is closer to your 50D than the other current offerings.

But it really comes down to your skill level. If you shoot green box or automatic modes the benefit will be minimal. Do you mind the extra weight. Many people I know I wouldn't recommend a FF body because they just do not need it.

With FF you will end up buying a body and lens. The 50D was my first dSLR, I followed it with a 5D which I considered a huge upgrade. If you were to get the new 5D IV or a 5Ds R it would be a huge leap in technology from where you are now. Add to that you will spend at least $4K getting the body and a decent lens.