Hi @BassPilot! Welcome to the Fender Rumble Club, and you've certainly come to the right place. Yeah, the V2 Rumble 150 combos are heavy due to MDF cabinetry. In the 3 years (2010-2013) of their manufacture they were the number one selling bass amp in total world wide sales. They sound fabulous and are plenty loud enough for a typical bar/dance club gig. One watt per person occupancy is a good rule of thumb. Usually anything of 250 people and above will require PA support no matter what amp you're using.
You could easily keep your Rumble 150 for rehearsal & gigs, and just pick up a V3 Rumble 40 for personal practice. This is a very popular option for many bass players even those that use a different brand of amp for their gig-rig.
$200 USD new & shipped. No more moving your amp around except to gigs and back.
The V3 Rumble 200 combo is 140 watts into it's internal Eminence 15" woofer. This newly designed cabinet and woofer combination is killer for tone and SPL. If you haven't played through one, you should. See if you like the differences between the two. Also the 36 pound Rumble 200 will seem a lightweight miracle compared to the 60 pound Rumble 150. You get the full 200 watts with the addition of an 8 ohm extension speaker cabinet. That's a capability you just don't have with the Rumble 150. Both have D-Class ICE Power sections for clean, transparent, and reliable power.
The Rumble 500 is just more of a good thing. Same front end. 350 watts into it's internal 2x10 Eminence drivers. 500 watts when a 8 ohm extension speaker cabinet is utilized. Too much of a good thing is barely enough!
So take your pick, as you can't loose.