This question comes up often and I feel like its the same as asking "which Mercedes-Benz should I buy?"
The answer is, it depends on your needs.
But it also begs the question, why not consider BMW as well? Or Chevrolet? Or Ford? Or Rolls Royce?
The truth is there are many decent brands of regs out there that serve various niches at various price points with various levels of bells and/or whistles.
No doubt that Scubapro regs are fantastic. I might even be biased because all of my regs are Scubapro or Halcyon (which are rebranded Scubapro).
But that doesn't mean I wouldn't consider other brands if I were in the market.
I just find it odd that people often pick a brand and ask which product from that brand should I buy?
I think the better way to go about it would be to plot out your desired features and price range and compare various regs from different brands that fit your criteria.
I realize you might be asking this question because maybe you can get a pro deal on a certain brand but I see this question come up so often (especially with regards to SP) that I just have to believe it is the brand's marketing hype which leads divers to believe (falsely) that if its not SP its shite.
Fact is, a good reg from most reputable brands will last you a lifetime if it is maintained and serviced properly.
Another fact, most divers never push their regs anywhere near their performance capacity.
You may as well just buy the one you think is prettiest.
However, the short answer to your question...MK25 with G260, S620 or A700 with as many titanium and/or carbon bits as you can afford.
