I was also amazed how hard it was to get a suggestion of what to replace a TSS4 with. Especially as price was not a limit.
Despite the zillions of reels on the market, nobody seemed to be able to suggest or try to sell me a same or better product for the specific feature of high cranking speed.
Eventually a bloke at the Tackle Warehouse suggested a Diawa Emblem Pro 5500A.
That reel is actually faster on the retrieve than the TSS4. Fair Dinkum. I took them both to the river and did a number of retrieves to compare.
After 2 years it shit itself due to salt water ingress and cost a couple hundred dollars to repair. I must admit I took it everywhere on my jetski, so it did get wet.