Road Wheels & Road Wheel Recommendations?

Quick bit of advice needed....

In spring I purchased a Genesis Equilibrium - It was on the cycle to work scheme so I got the 520 frame and fork. Really enjoy riding it, but it is unsurprisingly weighty (11kg), so for next year I'd like to shed some grams. I was thinking that the best way to do this was to look at wheels, as the stock wheelset is not special by any means (front wheel including tyre and tube comes in at 1.5kg).

I'd be looking at a max budget of £400. Question is, would it be worth it to change the wheels at that price range, i.e. would there be a big enough change in ride feel to wax the dorrah? If so, what is good in that price range, both for OTP wheels and handbuilt ones (love the look of archetypes)?

Thanks for input!

How heavy are the stock wheels? For 400 quid you should be able to buy/build something around 1500g - but probably heavier if you use something like an archetype.

What about rs80's?

Oh and yes- there will be a significant difference if your current wheels are around 2kg.