"Best buy" is always very subjective. Personally, I would not buy from a brand like Rega/Chord and others, who add 400% to the build price. Effectively for a £100 cable, you are getting £25 worth of material.
For me, that's not a "best buy"
There are manufacturers out there using RG316U which is about £2 per meter and charging £200+ for a 2m pair of cables. It's atrocities like this that give hifi a bad name.
Best value is always DIY although I'd avoid Klotz like the plague. Terribly veiled.
If you can solder, get some MSAudio plugs and a couple of meters of Mogami negflex and have a great pair of cables for about £30.
They will be better than the price suggests.
As I said, you're welcome to loan the SPOTFIRE cables doing the rounds and see how they compare. No obligation to buy, just give them some feedback.
In fact, give me a shout and I'll make you a pair of Mogami if you need something cheap and cheerful.