Nice to hear someone after quality, there is often a compromise between price and quality and at some point there is always going to be a clash.
I agree with the two UK suppliers mentioned, there are two very different suppliers that are attacking the pen turning market from different ends.
There are other kit suppliers as well in the UK and also international ones. Is you search the forum it has been discussed many times.
There was a thread started for UK suppliers and also international ones, each had a list of ones we had used and gave feedback on the service, kit quality and pricing.
One problem with the above suggestion, the JR Gents, often called Gent, Gent II, apprentice Gent. It's a kit that has been copied the most and comes in many different qualities. So be careful what you buy and where from.
Some of the copied Gent kits you can't even change the nib due to the feeder being glued or interference fitted. 
The Gent is a minefield one to buy.