At risk of sounding heretical and going against the tide of buying better: am I going to notice an enormous difference in a £90 ldc versus a £200 ldc?
(Assume for argument's sake that I have a reasonably treated recording space)
I don't think that question is valid, as you could argue there are enormous or subtle differences between ldc mics regardless of price comparisons! You may find a £90 mic suits your particular application more than a £1000. It's all dependent on what you're looking for. I preferred my CAD M9 over a TLM193 on certain voices (until it became noisy). I sometimes use an SM7 over a TLM103. Having said that I don't have any sub-£200 mics, so maybe I'm missing out on something?