I have both a Ray4 and a BFR MM Stingray Special.
The Ray4 is amazing (less the electronics) which are easily remedied. This is my ‘testbed bass’ with SIMs pickups in it and I like them in it so much its going to stay this way for quite a while.
The higher end MM Specials are absolutely top knotch in every aspect and it is one of my most favorite for that and the tones. Do you need it, nope. Do I love it, yes. If you want one to have one, then do it, but you don’t need it to get what I think you are looking for.
A properly modded Ray4 is an amazing deal. Out of the box though the pickup is not great, flip that and you are in business. It is one of my favorite necks to play as well btw.