I need to purchase a new bag to check and am torn between 26" and 29". Both bags would have four wheels. I plan to use it for 2 week trips as well as shorter 6-10 day trips. I'm also concerned about going over 50 lbs with the 29". The bags I am looking at weigh about 10.5 and 12 lbs, respectively. Any thoughts would be appreciated.

Thanks in advance.