I'm looking for a replacement for my 10yr old Giant Iguana. I no longer ride dirt of any kind and have narrowed my search down to two bikes. 1 Trek fx 73 and 2 Cannondale Quick 4. Any one have either of these bikes or have anything to say about them? More info, I ride 8 - 12 miles per day but would like to up it to 15 or more, most riding is on flat land no large hills, $700.00 budget, there are dealers for both bikes within 30 miles of me. Thanks in advance for you info.