Hi....I wanna new bike.

So I've been riding 1.5 years. I've put about 2500 miles on my current bike. 2000 of that this year. I ride roads and have some interest in Triathlons. I've raced one. I don't think that I'll get heavy into them, maybe one or 2 a year and maybe eventually a half ironman.

My biggest goal is to get faster and stronger on the road. I usually ride betweem 50 and 80 miles a week. I've done one century.

I ride a 2005 58cm Trek 1000sl. I got it on sale for about $650

I want a 2007 58cm Trek Madone 5.0, full carbon bike, mostly ultegra components. cost about $2,500.

I need your opinions.....do you think that I will get much benefit from the new bike?