Dutch80,
I have a 61cm 2012 Felt Z5 and I love it. I feel very comfortable on the bike. I did put a new seat on the bike to improve comfort as my rear was a little oversized for the stock seat. My LBS had a seat trial program where I could test various seats.
I am 6-4 and was 295 when I bought it about 20 months ago. I have put about 6000 miles on it.
I agree that new wheels are a good idea. The bike came with Mavic CPX22 wheels and they lasted about 2000 miles. They had small cracks near the spoke inlets and I started breaking spokes regularly. I replaced the wheels with velocity deep v rims and upsized to 36 spokes. The wheel set was around $500. These wheels have about 3000 miles on them now and they have not required any adjustment since an initial truing.
jwr