This is my last Thread about this ...promise haha!

I currently have a '13 Trek Lexa SLX which is an aluminum/carbon mix of domane frame and 105/tiagra components. I want to upgrade to something lighter, carbon, and faster. I don't race but I need something to keep up with group rides and climb hills as smoothly as possible. I want a bike that I will be happy with for a while which reflects frame and components. I don't want to cheap out but my budget really is around $2.5K. $3K is such a reach and I can only do it if it is hands down an awesome and perfect bike. I own 2 Treks and they seem to fit me well so I'm sticking with the brand. Current options I am considering are below -

2013 Trek Madone 4.5 WSd - $2,200 (Sale of $430 off retail price)
Trek Bicycle

(I don't like the 2014 Trek WSD options which include a hot pink 4.3 or a jump up to 6 series for $4,500. They don't have anything in between which sucks so I'm also looking at the '14 Domane 4 series.)

2014 Trek Domane 4.3 WSD - Would cost $2,000 mainly 105 components. A bit heavier than the Madone. (Weight does matter because I am somewhat petite and I'd like to haul lower weight if possible.)

Trek Bicycle

2014 Trek Domane 4.7 WSD - Would cost $3,100. All new Ultegra components and light weight like the '13 Madone. I know that 105 is good but I can definitely tell the weight difference picking up a bike w/ Ultegra vs 105 but this is a huge reach financially.
Trek Bicycle


Let me know what you think. I know that ultimately, it is my choice but as far as what I would be getting for my money and how satisfied I will be long term, I'd like to defer to more experiences riders. Thanks in advance!