Over the years we've used many different brands of tender.
Boston Whaler (13, 15, 18, 19 and 25 footers)
Cigarette (30 & 32s)
Donzi (Sweet 16 & 18)
Castaldi Jet RIBs
On one boat, a 75m, we ended up making our own design of Aluminum tenders with twin Cummins and ZF outdrives. They were 'OK-ish' but way too heavy; ask K1W1, his team had to work on them.
They have now been changed to these.
Depending on how you use your tender I can only recommend a RIB with a big outboard, not an outdrive or jet though. Boston Whaler 2nd (Skiffs seem to slam a little) and just for the love of them, 3rd a Donzi, totally impractical but soooo beautiful.