I have a Giant OCR C3, she has been my faithful servant carrying me thru 3 Aids Rides, countless centuries and a long drawn out divorce. I have the itch to buy a nicer better bike. I upgraded the handlebars and the seat but that is it. Soooo do I replace her? I could spend about $4k. I'm not gonna race but do ride about 400 miles a month. Once the time changes here in California I will ride in the mornings too, so that mileage could likely double. I'm short 5'2". SO a Women's specific is preferred. Any bike suggestions?