hey bud, welcome anyways as i dont think ive seen you before.
Your faced with the 2 choices already presented.
You have an existing, & your thinking upgrading...so
keep your cube going till your new tank with a factored allowance for transfering rock/sand/livestock is ready.
or transfer everything now, & be aware that you have 1/10 the filtration capabilities to the volume ratio & water changes will need to happen every few days tops based on toxic buildups you can test & monitor.
Now this can be done, but not really advisable in the interest of your livestock that you've cared for over the past year - looking at it logicly, you have same biological load just in a larger ratio environment, so any die back from the transfer aside for a min & your tanks requirements will be the same.
Only problem is that its not just the fact your upping the water real estate, your starting another tank fresh which has its own equilibrium to reach with or without your contributions. Your contributions will just decrease the time needed to reach this equalibrium. So basicly yeah, i agree with what the other guys have written.
lol