Were you planning on ordering a frameset alone? I ask as Orbea do not offer Campag as an off-the-peg spec option but they do offer SRAM, so if you go down the SRAM route it may be easiest on the wallet to just buy a SRAM equipped Orca (the My-O custom colour would still be available) and then swap whatver parts you want to over time. Or if you already have the parts you want to substitute then make the swap and ebay the unwanted bits - brand new they're guaranteed to sell.
As for the question of which to go for - have you ridden both before? Ergonomically and in operation I much prefer the feel of Campagnolo, but that's just me. IMHO I feel to make an impartial groupset decision you should blindfold yourself and put your hands on the shifters - whichever is comfiest, go with that, as that is your interface.
I planned on ordering the M20Team because its the cheapest complete bike. I can get a slight deal on a stock color, but if I do the MyO, I'd be paying full retail. I plan to strip it for the frame and sell the parts or use the parts for a winter bike. I have owned both SRAM and Campy. Campy feels better in the hands and is always a joy to ride. Functionally, I liked riding the Red22 because I felt like I "set-and-forget-it" more than the Campy. My SR needed more attention.
Right now I'm leaning towards SRAM, but caught between mechanical (for the most weight savings) or eTap. Talking to friends and a shop owner over Thanksgiving rides, eTap is sounding better and better if it's the group I'll ride the most all the time. Not having to ever/rarely touch it for adjustments, ride it all winter and not worry about cable/housing, perfect shift every time, makes it almost worth the weight penalty.
Why orbea m20 specifically? I think the old orcas used to be some of the nicest looking around, but the last few just look like everything else. Can't say i am a big fan of any of those colour schemes but enjoy the lack of logos.
I planned on ordering the M20Team because its the cheapest complete bike. I can get a slight deal on a stock color, but if I do the MyO, I'd be paying full retail. I plan to strip it for the frame and sell the parts or use the parts for a winter bike. And it seems everything is looking more similar. Specifically however, the Orbea is the closest to the measurements of my Custom Sycips and to the HA, Fork Rake and trail numbers I'm looking for that will produce the ride/responsiveness I want. The only other bike that comes close is the Giant TCR Advanced.