Dear all

I have recently purchased my first "good" bike - Giant TCR Advanced - and loving it!

The bike comes with Giant P-SL1 Wheels, which I understand are the most basic wheels made by Giant. P-SL1 WheelSystem (WheelSystems) - Bike Gear | Giant Bicycles | New Zealand

So far the wheels have been fine for training, but I wonder how good they really are. Unfortunately, I could not find any proper reviews, and I do not have much experience to know how good wheels feel like. I signed up for a 160km sportive, and I wonder if I could improve the experience by getting new wheels.

I have been thinking about the following wheelsets:

* Campagnolo Zonda - wiggle.com | Campagnolo Zonda Clincher Wheelset | Road Race Wheels

* Campagnolo Shamal Ultra Mega G3 - wiggle.com | Campagnolo Shamal Ultra Mega G3 Clincher Wheelset | Road Race Wheels

* Campagnolo Neutron Ultra - wiggle.com | Campagnolo Neutron Ultra Clincher Road Bike Wheelset | Road Race Wheels

* Zipp 30 - wiggle.com | Zipp 30 Clincher Wheelset 2013 | Road Race Wheels

My questions are:

1. At this price point, will I feel any noticeable difference between my P-SL1 and these wheels? Will 200-300g of weight really make that much difference?

2. Out of the above wheels, are the more expensive = better? If not, which of the four would you recommend?

3. Any other wheels I should consider (under about USD700)? I am looking for something what would roll fast and climb well.

Thanks in advance!