Chris, have you ridden all these bikes?, If not, stop, take a step back, a deep breath and relax bud. If you've already decided you're gonna buy a bike this weekend you might just buy the wrong bike. All your choices are good ones with slight bits here and there of nuanced differences, however, none of that matters if the frame doesn't fit and you don't like to ride or "feel" of the bike.
One note, Giant makes more bikes under different manufacturers names than any other bike company in the world. They're not the flashiest bikes but they're damn good and highly underated.
Components mean squat on a frame that doesn't fit you properly and every company has a different "definition" of what a "56cm" is or what a s/med/lg/xl" is for example. A "compact" design fits and can "feel" different than a standard frame design, not a good or bad different but just different.
The frame fit is the one nugget that has to be right cause you're not gonna "change it out" like you can a stem, crank length, bar width etc. It looks like you're right around the $2500 price point and for that kind of money there are lots of great choices depending on fit. I'd stay far far away from a "mail order" frame like Pedal Force and even a Velo Vie from the simple fact, you're a big guy, you don't have a lot of experience with bikes and bike fit and you really haven't ridden enough bikes to really know what works best for you either size/fit wise or material wise, steel, carbon, alum. Both of those are good bikes and I own one of each but I've got my fit pretty much dialed so it was a low risk purchase for me. Also, I've ridden enough bikes to know what to expect material/performance wise when I buy, even through the mail.
One problem in the bike industry is the lack of a standardized frame sizing. A 56 by one company is not the same as another's. A "large" is not always a large and some companies do extended sizing including "medium large, xxl large" etc making it easier to dial fit. Until you know how each bike fits as you ride it you can't just guess that a companies "58" will fit.
An example, I just purchased a "standard" 56cm frame that had a 54cm top tube, hardly "standard" as the company stated. I knew that when I bought the frame but someone else might of been stuck with a frame that was to short in the top tube.
Another question, have you ever had a professional fit done? If you haven't it might be a good idea to give Russell a call and "get dialed" before making the purchase. He'll be able to steer you in the direction of compact/standard design, seat tube/top tube size range, bar width, crank length etc
Going with a bike through the mail for you would be like playing the lotto, you might "hit it and you might not". There's no better place to get what someone like you needs, at least for this first round, than your local LBS.
And, as Gregg said, if you can dial the fit and just purchase the frame that's a good way to go.
KRhea