Anybody have any opinions on deciding between a 2007 Scott S20 (Aluminum with Carbon Seatstays & Fork, full 105 components) and a 2008 Argon 18 Krypton (full carbon and full Rival group)?

I've had too much time to think about this decision, and have been back and forth about 10 times. Both of them are "good deals" as far as price, with the Krypton coming in about $700 more than the S20. The LBS owner says go with the S20 and spend the extra money later on a good pair of wheels, and I'm inclined to believe him, but I just want to make sure I'm not back buying the Krypton in a year or two when I could just spend the extra money now. And, if I do go with the Scott, that it's actually different than what I already have.

Current bike: 06 Specialized Allez Sport (Aluminum w/ Carbon fork, Tiagra/105 components). I really like the road feel/speed/general performance of this bike, but granted, it's my first road bike.
Use for new bike: Crit racing, training (sadly, not with hill climbing, Illinois and all), 75-100 mile rides. This will be my first season racing, but I want something that I can grow with, rather than beyond.

Thoughts?

Anybody have any opinions on deciding between a 2007 Scott S20 (Aluminum with Carbon Seatstays & Fork, full 105 components) and a 2008 Argon 18 Krypton (full carbon and full Rival group)?

I've had too much time to think about this decision, and have been back and forth about 10 times. Both of them are "good deals" as far as price, with the Krypton coming in about $700 more than the S20. The LBS owner says go with the S20 and spend the extra money later on a good pair of wheels, and I'm inclined to believe him, but I just want to make sure I'm not back buying the Krypton in a year or two when I could just spend the extra money now. And, if I do go with the Scott, that it's actually different than what I already have.

Current bike: 06 Specialized Allez Sport (Aluminum w/ Carbon fork, Tiagra/105 components). I really like the road feel/speed/general performance of this bike, but granted, it's my first road bike.
Use for new bike: Crit racing, training (sadly, not with hill climbing, Illinois and all), 75-100 mile rides. This will be my first season racing, but I want something that I can grow with, rather than beyond.

Thoughts?

Good wheels are great, but what kind of wheels do the bikes come with?

The Scott is all stock, and the Argon would be a build, so I think we're looking at a Shimano 550 wheelset on both. Realistically, the wheels would probably get "upgraded" at some point with either bike, but probably sooner with the Scott.

I've got a 2008 Scott S20 that I use as a race/wet weather bike and I like it a lot for this purpose. The bike is stiff, accelerates well, handles quickly and is stable at speed. It's not the lightest thing out there but is plenty light enough for general racing.

The downside is that the ride is a bit rough if you are racing longer distances and the head tube is a bit tall for a race bike (I use a -17 degree rise stem on mine).

I would say go with the Scott...pick up a set of Neuvation R28 Aero wheels for $369.00, throw on a set of light tires and you will have a nice race worth bike that you won't be nearly as worried about crashing should it happen in a Crit or road race like you would if it were a more expensive bike.

That's my .02 worth...