I'm trying to get an idea of how much i can improve when i get my own bike (i plan on buying one soon). I've down a couple of sprint tri's on a borrowed cannondale road bike, it's old and has no areobars, but is a good bike. for the competionions I averaged just over 19mph, and most of my training rides are in the mid to high 18 mph range. So my quesiton is, how much faster could i go with a good new bike, and what do i need to make sure i get with it? are areobars and clip-in pedal essential, or just a personal choice thing? and how much of a difference will I feel with a bike that is fitted for me? how much time can i drop over a standard distance tri race? thanks for any help.