Road noob - first bike

So, I fancied a go at road and bought this:

2011 Cannondale Synapse. 105 mechs, Ultegra levers/shifters, Tektro brakes, Mavis Ksyrium Elite wheels and.... ummm... other stuff. I'm after a new saddle (got my eye on the Charge Spoon) and it could do with some new tyres (Conti GatorSkins?). I'm sticking with SPD pedals so I can swap to and from my MTB easily. I'll be mostly riding for exercise and the occasional sportive or group ride - not looking to compete or anything (unless the bug bites me).

2011 Cannondale Synapse. 105 mechs, Ultegra levers/shifters, Tektro brakes, Mavis Ksyrium Elite wheels and.... ummm... other stuff. I'm after a new saddle (got my eye on the Charge Spoon) and it could do with some new tyres (Conti GatorSkins?). I'm sticking with SPD pedals so I can swap to and from my MTB easily. I'll be mostly riding for exercise and the occasional sportive or group ride - not looking to compete or anything (unless the bug bites me).
Cube Reaction GTC Pro 29 for the lumpy stuff
Cannondale Synapse alloy with 'guards for the winter roads
Fuji Altamira 2.7 for the summer roads
Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
Cannondale Synapse alloy with 'guards for the winter roads
Fuji Altamira 2.7 for the summer roads
Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
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Kinesis Racelight 4S
Specialized Allez Elite (Frame/Forks for sale)
Specialized Crosstrail Comp Disk (For sale)
Cannondale Synapse alloy with 'guards for the winter roads
Fuji Altamira 2.7 for the summer roads
Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
Cannondale Synapse alloy with 'guards for the winter roads
Fuji Altamira 2.7 for the summer roads
Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
Kinesis Racelight 4S
Specialized Allez Elite (Frame/Forks for sale)
Specialized Crosstrail Comp Disk (For sale)
Well it looks like I'm going to have to find another range of brakes (eg R451, R650) to get the long drop, I guess this is why the Tektros were on there in the first place rather than the more familiar Shimanos.
Cannondale Synapse alloy with 'guards for the winter roads
Fuji Altamira 2.7 for the summer roads
Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
Good site for comparisons
http://www.bicyclerollingresistance.com/
Voltaire
My main road bike comes from a similar pedigree to yours (although a bit lower down the pecking order) and after 5 years of tlc it is a very capable bike indeed!
Most important bit is to get out there an have fun!!
edit: The R650 brakes are some of the best long drop callipers out there- they may not be quite as good as the modern 105 and above Shimano brakes but they are a different league to the tektros. I the short term better brake rubber helps- I find a igger difference between brake blocks than the actual callipers. The Dura Ace pads are decent value and work well, but the last word is Swisstop Green etc. Not cheap (but not that expensive either as they last a long time) and they work exceptionally well.