Tunnelrat81

It honestly could be, but since you haven't been fitted at all really, I'd avoid swapping saddles until after that. That's the flite gel flow saddle right? That's a good saddle, but there are more individual saddle preferences than there are saddles on the market, and there are LOTS of saddles on the market. Saddles are a tricky thing though, and require some experience on different ones to totally understand. Many new riders appreciate the softness in a stock saddle that comes with a bike (bontrager lux is a great example), but quickly realize that if you're putting anything more than 5-10 miles at a time on it the muscle ache that results from all the spread out pressure is excruciating. This should lead you to try out some harder saddles, ones that will 'perch' you up on your sit bones and keep you from 'sinking into' the saddle and thus hindering the muscles that you're trying to put to use down there. The challenge with a harder saddle is that it puts ALL your pressure on your sit bones, which up until now haven't had to bare much weight. Now you're feeling a different and equally horrible pain. But there's an important difference. The sit bones, unlike the muscles, can adapt to the abuse and given enough time will eventually 'callus' up and keep you painlessly suspended on your saddle, allowing you to ride without circulation or muscle pain problems. This transition can take time, and if it doesn't improve after a 4-6 weeks, it's time to look at a different saddle shape/width or both.

This of course is all AFTER you've been fit. The fitter that I used also offers a more comprehensive fit that involves power output and costs quite a bit more, and there are other semi local fitters who charge in the range of 250 for a proper fit. Realize that there's a difference between a fitter who has simply taken a class and one who has been doing it for 10 years +. Call around to all the shops close by and ask them who they'd go to if they wanted a really pro fit. If the same name comes up more than once, give them a call and find out more. It'll be well worth your time/money.

And of course, keep us posted. Good luck.

-Jeremy

*edit* I just noticed that the M/L Giant size is around about a 56cm frame. That frame size SHOULD be too big for someone your height, and might just mean that with the saddle set properly for you, the handlebars were a bit higher, and the overall geometry effectively more 'upright' in comparison to yours. In the mean time, while you find a fitter you could try flipping your stem up, and perhaps even move that last thin spacer to below your stem. This will raise your handlebars and bring them a tad closer, which might just make a positive difference until you can get professional advice. You'll have plenty of time to develop your flexibility on the bike and slowly (over months and years) find yourself in a more aggressive (and still comfortable) position.