Your unlikely to find unbiased opinions here or anywhere else.
Dell, Mesh, Time, Evesham et al are all well known and 95% of the time are good companies to deal with.
There are others who are less well known who may or may not be better or worse.
There is always the option of building yourself or getting a local shop to do so for you.
Find the right PC at a price you are happy to pay and do so. There are always risks.