Here is the thing, it starts out as a hobby, but then it becomes an addiction.
Like any good habit forming thing.. it is always best to have the best there is to offer.
So what you really want to consider is, will this continue to be a I use it once a week" thing or will it be,
It started out as once a week but now im using it on a constant basis.
My theory has always been, if im using something on a constant basis, for work purposes, buy the best there is to offer. Especially when the difference is only a couple hundred and not a couple thousand.
The extra tools in Platinum are well worth the price. but if your not going to be recording stems and your only going to re working older material, Professional will do fine.
What ever your choices, you have joined the best working forum on the internet.
This forum alone is worth every penny you pay for the software.
Good luck
Chuck J