So, I have actually changed a couple of things on my Omeo 2.0. Thought I'd post up for the sake of completeness.
Firstly, I changed the cassette from the 11-25T it came with to a 11-28T (11 speed). This is so I can attempt hill climbs I'm not vaguely fit enough for (Mount Coot-tha, it still hurts like hell with 28T but it does help somewhat). No chain change required. Also means I very rarely go to the small chain ring (a little ironic when I finally have a bike with lightning shifts on the front cogs).
Secondly, after fiddling and reading and getting advice, I changed the saddle for a Brooks Swallow Classic (chrome rails). Never had a Brooks before, but my other bike has a Selle Italia that still gave me numb nuts so after much forum surfing I decided to give this a whirl. First ride this morning, still adjusting, but already feeling like a leather lounge vs the Arione. It's a few hundred grams heavier but it's worth it I think.
Some pics, a comparison of the Fizik Arione vs the Brooks, and a couple of the bike as it is now:
http://www.flickr.com/photos/115919615@ ... 305592385/
Speedplay pedals, old garmin etrex (does the trick), couple of BBB cages, large Lezyne saddle bag.
I do have a little tingling in my feet after about 40KM still. I think this might be cleat position and I might move them back a little. I thought this was blood being cut off by the seat but today my crotch/butt region was fine on the new saddle, but feet still tingling/pins and needles.
I'm considering lifting the bars a little as I'm trying to get to used to riding drops instead of hoods (there's a riser above the stem I can shuffle under for just shy of a CM). I'm just wary of changing a lot of things at once and try to just make one change after each ride.