From what I have seen... pampering Italian bikes means regular use. Frankly? The sitting around and lack of use tends to cause more damage than regular use. Low mileage means almost nothing to me. Did it get started regularly. Did it get moved. Did it have heat cycles... etc.
Personally, I see no point in having more than one of the same bike. So... I applaud moving forward and diversifying with things you can actually enjoy.
Traitor? hardly. Even in jest.
You can run any square side cover I believe. You can also run this:
http://www.mgcycle.com/index.php?main_page=product_info&products_id=2455
Which is an adapter for any round sides to fit the big twins.