I reckon compare all the brands (KH, Nimbus, Mad4One, Qu-Ax) and they are all good. If you buy any of these munis it will be a quality uni, but I think the customisation options, colour choice, individualised customer service and price all make the URC/Mad4One a really good choice.
KH is on the pricey side, Nimbus is solid but vanilla and a tad boring, they are what they are (sorry!), Qu-Ax is probably good but I think you have to use their cranks (note: There are few Qu-Ax’ers in Aus which is where I am).
Mad4One’s are individually hand built to your specs and ship worldwide at a very competitive price, and quickly.
Of course, look second hand but mid sized munis are very popular and they are unis that people don’t tend to sell off. I think once you buy a muni, you tend to want to keep it.