Road Cycling - What performance gains did you get with new wheels?

Hi everyone, Getting ready to purchase some new wheels for my road bike and was wanting some feedback before I make a purchase. I figure I'll spend in the range of $300 to $700 ( I know this is a big range, sorry). I'm not against buying a set of custom wheels either. I have read many older posts and replies on what wheels many are using, but I haven't really seen anyone mention what performance improvements they were seeing, ie what it did for their AVS/Cruising/Flats/Hills/Acceleration. My wheels right now are 4 years old and are Mavic CXP 21's with Ultegra Hubs. Hoping to buy a set of wheels which I'll be happy with.

Not looking for exact improvements, just hoping for a better idea.

Thanks in advance!

My switch to Mavic Ksyrium SSC had a small affect on my riding speed which is mostly notable during descents when I tuck in and rocket down a hill.

They are a very smooth spinning wheel which I would recommend. The Ksyrium elites are a bit less expensive with the same hubs and rims just different spokes.

The difference is very small however so do not expect miracles from changing wheels.

i experienced miracles! LOL

well maybe i did become a stronger rider at the same time... but after i switch to my cane creek aerohead teams, i could fly up hills that used to beat the poop out of me. and i noticed about a 2mph gain in my cruising speed.

switch from shimano 105 + Araya 700c(forgot the model) rims to Shimano XTR + rigida sphinx.

Faster acceleration... Overall speed on downhill increased by 2-5kms depending on wind..

Bike felt lighter.. well, XTR+rigida shpinx was a couple of grams lighter..

you'll very likely experience a perceived performance increase when you buy a new set of wheels, because you will have talked yourself into it. you'll go faster because you feel you should be going faster. which is not necessarily a bad thing!