First of all, you have to buy the bike that fits you best. Enough said.
Second of all, why don’t you have any faith in QR brands? Personal experience? Have you owned one before? I have lots of experience with QR. I owned a 2000 Tequilo and now ride a 2004 Tiphoon. I test rode Cervelo dual, Trek Team Time Trial, a 2003 QR Caliente, and a 2003 QR Tiphoon. Money was not a factor as I had the greenlight from my better half to buy any one of those bikes. I loved the 2003 Caliente. Only problem was it was a 53cm and based on riding the 55cm Tiphoon I new I needed a 55cm Caliente as their geometries are exactly the same. This led to the next problem. I could not locate a 55cm 2003 Caliente with 700c wheelset anywhere. I personally liked the 2003 paint job vs. 2004 burnt orange. Plus the deals on 2003 Caliente were right around $1500 vs. around $2200 for a 2004. I found a screaming deal on a new 2004 Tiphoon and opted for this bike and have had absolutely no regrets since. I have the utmost confidence in the quality of QR and that speaks from personal experience. I didn’t have a single problem with my Tequilo. The quality of the paint job was great. At the time I sold it, it still looked showroom new. Components were full Ultegra, so that speaks for itself.
Here is what I didn’t like about the Cervelo. Cheap brake calipers, horrible paint job, subpar fork, average wheelset (Ritchey). In my opinion, an overrated bike. I liked the Trek Team Time Trial. Ride was very forgiving and smooth. Look of bike was sexy. Downside is I couldn’t get the bike to fit me. Comes in S, M, and Large frames and it either fits you or it doesn’t.
Your aerobar dilemma now. Have you had personal experience with the syntace C2s? Or do you just like the look of them or some other reason for wanting them? I personally like the adjustability of the Profile aerobars over the Syntace. You can narrow the pads and widen them, shorten the bars or lengthen them, turn the bars out or turn them in. Infinite adjustments. The stock aerobars with 2004 Tiphoon were C2 and I swapped them out for Profile. I had Syntace streamliners before and never did find them comfortable secondary to the lack of adjustability.
Your color dilemma. I like the 2003 color better but that’s my opinion. If I was getting a nice leftover discount on the 2003 Caliente I’d go for the 2003 and sink the saved money into accessories or a nice set of race wheels. Either route you decide on, I don’t think you will be disappointed with the Caliente. Good luck with your decision and let us all know which bike you finally decide on.