Is this a good choice for a bigger investment in a bike?

Hi everyone,

I’ve been considering this Cannondale Supersix Evo for my first “proper” bike.
I currently have a cheap and cheerful
Specialised Allez.

It’s second hand for £1,499

Following specs:

Shimano ultra group set
Hollowgram carbon wheel set
Zip carbon aero bar
Hydraulic disc brakes

I’m still new to riding, and my primary goal
Is to do more triathlons (and work my way up to an Ironman), but I would like something with more versatility than a TT bike.

Is this good value for money?