Bike purchase advice needed -- cross post

I'm looking at getting my first tri bike and am looking at a couple options -- but am confused as to which to get and which size to get and could really use some advice. I cross posted this because there's more traffic over here.

 Here are the bikes I'm thinking of:

 http://www.bikesdirect.com/products/motobecane/nemesis06_SPECIALpre.htm (Motobecane Nemesis 2008) -- This one can get shipping directly to me, would probably have to pay a lbs $50 to put it together all the way (90% assembled)

http://www.performancebike.com/shop/profile.cfm?SKU=5821&subcategory_ID=3040 (2008 Scattante T-560) -- This one I would have to drive 3 hrs to Phoenix to pick it up in a store, but then they'd do the fitting (I hear).

 There's also the options of a Javelin Varese, but the biggest they have is a 51.

Also, they have a Javelin Narni size 51 on ebay, but it's selling for $100 than Javelin had it for: http://cgi.ebay.com/New-Javelin-Narni-Triathlon-Tri-TT-Bike-48cm-51... />

I went to one LBS where he just had me stand on the bikes to check clearance and he told me I should be a 55 or 77.

Went to another LBS and he had me sit on a road bike and checked my hip/leg angle and told me I should be a 54.

I have also heard that with my top tube range I should be more like a 51....

Am hoping to stop at a LBS but not sure if I will be able to. Thanks for any advice!

 Here are my measurements from competitivecyclist.com... I am 5'9" and have a 33 inseam.

Measurements
-------------------------------------------
Inseam:                33
Trunk:                 24
Forearm:               12
Arm:                   23
Thigh:                 24
Lower Leg:             21.5
Sternal Notch:         57.5
Total Body Height:     69
 
 
The Competitive Fit (cm)
-------------------------------------------
Seat tube range c-c:   54.3 - 54.8
Seat tube range c-t:   56.0 - 56.5
Top tube length:       50.3 - 50.7 
Stem Length:           10.2 - 10.8
BB-Saddle Position:    73.3 - 75.3
Saddle-Handlebar:      48.3 - 48.9
Saddle Setback:        5.5 - 5.9
 
 
The Eddy Fit (cm)
-------------------------------------------
Seat tube range c-c:   55.5 - 56.0
Seat tube range c-t:   57.2 - 57.7
Top tube length:       50.3 - 50.7
Stem Length:           9.1 - 9.7
BB-Saddle Position:    72.5 - 74.5
Saddle-Handlebar:      49.1 - 49.7
Saddle Setback:        6.7 - 7.1
 
 
The French Fit (cm)
-------------------------------------------
Seat tube range c-c:   57.2 - 57.7
Seat tube range c-t:   58.9 - 59.4
Top tube length:       51.5 - 51.9
Stem Length:           9.3 - 9.9
BB-Saddle Position:    70.8 - 72.8
Saddle-Handlebar:      50.8 - 51.4
Saddle Setback:        6.2 - 6.6