After a lot of research I decided to purchase the Yamaha TRBX 304 and the Rumble 40 after reading Josh’s reviews in January 2021.
Keep in mind that these reviews are aimed at beginners and are basically the best bang for your buck when starting out.
Since purchasing them two months ago I have already upgraded both.
I now have a Yamaha TRBX504 and a Rumble 100.
The upgrades have cost me an additional $300 but I now have what I feel is my dream team.
There is nothing wrong with the Rumble 40 in the review but for the additional $100 I got a 12" speaker over the 10" and you can tell the tone difference immediately, because you are moving more air, and additional headroom/power that allows me to play at small jams/venues, which I do, or did before this virus crap hit.
There again there is nothing wrong with the Yamaha TRBX 304 but the upgrade to the TRBX 504 for $200.00 was more than worth it for me, after many discussions with @howard here on the forum . The 504 active/passive switch provides a, selectable, new vintage mellow tone to the Bass probably largely in part to the Alnico V pickups upgrade. I was not happy with the punchier sound of the 304.
And of course if I am at a jam/gig and the battery gives out I do not have to worry about finding a new battery.
Selecting a Bass and Amp is such a personal thing but as long as you get what you are happy with you cannot go wrong, after all, you will be spending a lot of time together.
I guess my main point in this post is - when buying gear do not compromise because in the end you will end up getting what you want so you might as well do it up front.