Bike upgrade

If you like your bike, I say keep it. A different bike isn't going to make you faster by itself. Your Sora group is plenty good!

If you want to get faster on your bike, get yourself a good trainer or rollers for winter riding.

The other consideration often brought up in these types of discussions is that a new upgraded bike will cause you to ride more, which is a sure way to increase speed. 

aero bars would be more benifical for ya. Will see bigger gains that groupo. But I found it important to work with someone on fit with clipons on a road bike, since geom. is very different than tri bike. If you can stand to loose wait, for now that is a cheaper way to lighten things up.. With buying speed it usually encompasses, deep race wheels, aerobars, aero helmet, TIGHT clothing and a solid (both aero and powerful) position. But I think aerobars if you dont have would be great, I have the Profile Sonix, love them!

Also in a tri, you gain more time saving from aero than weight. You can drop 5 G's to drop 5 ounds on the bike but only save half or less of what a set of race wheels or a great position with an aero helmet would save ya. aero trumps weight. There is a good thread about that on here, that I posted an articale on it.

good luck! trust me I understand what you feel.

Thanks for the feed back. I know I need to ride more and plan on it. The OCR has brakes where clip on aero bars would go, so they are not an option. I also had back surgery in 03 and that position is tough on me.