I would opt for more power, things change and an under powered router may not be a good expenditure at that time. Saving 40.00 now could cost 200.00 later and on the other hand keeping this logic within the realm reality I am not suggesting the "bigger is always better" type thinking..
Wisdom: Where experience and knowledge combine and become one.
"We are all one decision away from Stupid!!"
"How often we sacrifice the permanent plans of God on the altar of immediate solutions"
I have a very good memory, just short is all.