Originally Posted by bugsyonebike
Thanks for the input, Sparks. What year is your six13? What size frame do you ride? Just curious. The Six13 I'm looking at is a 2005 with mostly Ultegra equipment (carbon si crank). I'm going to ride them both tomorrow, so I'll see what happens. It rained here yesterday, which is whyI haven't test ridden already. The LBS owner rides the exact same Six13 in a different size, and he said he loves his. (I saw his bike) He said he may be able to come down from the $2500 price on the Six13, since it is an '05. The R5000 is an '06 and he said he wants to hold at the $2500 price point for a while longer on that bike.
The people I ride with, most of them are running 105ish equipment, but it doesn't seem to slow them down any. The DA gear shifts a bit more smooth, but not a world of difference.
I got an 05 Six 13 with the 3 carbon tubes, which I heard is more supple than the 06 with only the 2 carbon tubes. Keep in mind though, not all carbon bike are created equal. I looked at a Aquila carbon, it is stiffer than the R5000. I also rode my friend's Giant TCR1, and it flexes a bit more at the bad places. So far I find the Six13 offers the best stiffness and smoothness in all the bikes I've ridden.
Mine is a 54cm and I just went out on a 65km ride today with it. It's so much more comfortable than my Cervelo One it's not even funny.
Eitherway, I'm sure you'll get a great deal and a great bike.