I've raced in 5 sprint triathlons and have decided to take it to the next level. I plan on racing in Olympic distance tri's and possibly a half Ironman next year. Up till now, I have been racing with a 2013 Specialized Tarmac Mid-Comp road bike. I figure it's time to purchase a tri-bike. However, I'm not sure if I should an entry level or a more expensive, expert level bike. I know that if I purchase an entry level tri-bike, I'll probably upgrade a few components and wheels. But, I wonder if I'm better off just paying for a "complete" bike.
The entry level bike is a 2013 Specialized Transition (MSRP $2,200) and the advanced bike is a 2012/2013 Specialized S-Works Shiv DI2 (MSRP $11,500 but discounted to $8,500).
I appreciate any suggestions