I think you mean Tenba? or Tamrac? (Tamron makes lenses). Actually, you don't have much stuff. Its a lot less than I used to carry in a shoulder bag, but I recently switched to a Tamrac case that opens like an oversized briefcase, with zippers all the way around and a side pocket, a shoulder strap, and a double strap that lets you carry it like a backpack. (And it does qualify as an airline carry-on).
The problem is, I was concerned about rolling a case in the sand, where I do a lot of work as well. The small wheels would sink and get ruined, and I decided that I could use a handy folding chrome dolly for moving the case through airports and hallways, and carry it one way or another (straps?) at the beach (or rather, have my assistant carry it at the beach). You might consider a backpack bag as well. When I was in Miami, we rented a large cart that looked like an over sized wagon with big fat tires, which was used to carry the camera case, reflectors, tripod, makeup case, cooler, etc. Sometimes there's a lot more to a beach shoot than just a camera anyway.
You should just take all your stuff to a large camera store and lay it out, and see what fits, and which style bag you like (all the brands mentioned are good, just different), then buy the next bigger one to accomodate new equipment or rentals. I just don't think you have enough for a "case", unless you have a lot more stuff than you mentioned.
Andy Pearlman Studio