Felt F90...any opinions?

 To answer you question simply: you could get the Felt and race on it and have fun. The advnatge is a road is more versatile than a TT. Make sure the Felt handlebars will accomodate clip-ons! The older ones have a taper so you can't put a clamp on them. If you don't always need bigger and better toys than you would probably be happy with your felt.

But there are a few considerations

First your hieght shouldn't be an issue because bikes come in different sizes. AT 6'0" you probably are looking at a 56cm frame.

Felt makes decent bikes. The real difference between the F90 and the F80 are the components. I really suggest you try and get the most bike you can for your money because upgrades later always cost more. The biggest difference you will notice is how smooth the shifting is. From the Sora groupset to 105 is noticable. But it will still shift!

Is your shop trying to sell you a floor model or will they be getting it from the factory? Becuase the f90 comes with a triple crankset, which after awhile you probably won't need or like that much  unless you do lots of climbing on really steep hills. Also a triple crankset has a lot of redundant gears. If you need that low gearing see if they will put a compact crankset on instead. You'll look cooler, too!

As far as when to buy I live in southern california so I'm not even sure what "snow" means But you can get a deal if a shop is trying to get rid of last years inventory before the new season, the tricky part is timing. In my experience shops are tight lipped about when the new models are coming out so people won't wait for prices to drop.

If I remember, the f90 has the extra inline brake levers across the top of the handlebars.  They are kind of nice, but they might make it impossible to put aero bars on it.     I guess you could have them removed, but that might cost some extra labor.