Bahco are pretty decent. Pferd also good. Vallorbe excellent.
I've not tried the Beta, so can't comment on their quality. It's worth noting that the supplier in the OP's link lists Bahco too. The 10" Bahco ******* set 1-478-10-1-2 AND the 8" Bahco second cut set 1-478-08-1-2 have a combined price lower than the 8" Beta set. That seems like a better way to spend the money to me. Obviously, if you are just using the link as an example and need to look for a more local supplier, things may be very different.
I've been using the Bahco file sets for general plant maintenance work for several years and can't fault them. It's difficult to realistically assess longevity, because much of my work is outdoors on site and in the English climate: I've wrecked a good few files by essentially abusing them (filing millscale, filing hardened steel, etc) and by getting them rusty, but I've not had any proper "that should have lasted much longer" moments without most of the blame being down to me.
I've had Stubs (British), Vallorbe (swiss), Grobet (Swiss), Simonds (USA), Nicholson (USA), Oberg (Swedish), Tome Feteira (Portugese) and many others over the years. Generally speaking the top-of-the-line older stuff always seemed better than the newer stuff.
For precision bench work, I'd probably choose/recommend Vallorbe as the best of the current production: QC seems to be superb and the range includes just about every file anyone could want. However, I'd also suggest that anyone doing much bench filing will have far more skill and knowledge of the tools needed than I do and shouldn't be listening to me.
For general use, I'd recommend Bahco, or maybe the Tome Feteira: I've only used other people's Tome Feteira and I have no idea how well they'll hold up long-term.