Claude, bintel have just told you what I have been trying to say. The 12" tube is a heavy scope and needs a good mount. Some pros and cons of the 12" and G11 combo listed below.
Pros
1. scope and mount can be broken down into smaller bits (less weight).
2. G11 is a reasonably accurate mount so can be use for AP.
3. You can put other scopes besides the 12" on the mount (flexibility).
4. Good resale value and last a long time (value).
5. Stable (a must).
6. you can use the LX200 tube (mirror lock).
7. I am sure theres more but it's too early in the day.
Cons
1. Need to learn to polar align (no problem once you have practiced).
2. The mount suggested does not have goto so would need to upgrade to the system with gemini controller or use an argo navis or learn the sky
.
3. It's expensive but you did say this was going to be your last scope
.
I am not sure why you have your heart set on a 12" meade. If it's too expensive there are a lot of other good options out there and it would be well worth it to explore a little more.
Mark