My go to cheap wheel would be the planet x model b- light, cheap and reasonably strong.
They did them for 99 a pair. I put them on the mrs dolan race bike as £for£ it was the best known reliable option for the weight.
But as far as noticable difference…..no…
Ive had all sorts of wheels but i maintain as long as their round and have good rubber on than outside of a crit or hill climb it makes very little odds to the enjoyability of the ride- with the exception of my 100mm carbon deeps…. They are paintful over 100miles- but that could be the tt bike they are fitted to also 🙂