Geordi, I also ride a batavus fixed conversion (my very first) with Shimano dynohub, Moustache bars and fenders! Do you also have one?

I didn't know the 1.1 is 454 when 415 was claimed (at least for the 28 hole,single wall variety) I have read nothing but good things about the Open Pro. It is a massive 140 grammes lighter than a Deep V and I hear they can take abuse.

I am already running Schwalbe Ultremo's ( not the R version) at 190 gms a piece and they are holding up pretty well. I skidded the rear once or twice and decided it wasn't worth wearing away a top dollar tire that fast! I was also thinking of using latex tubes as they are generally 50 % lighter than normal ones. The thing is, I am ususally anything but a weightweeny, just look at the deep V/ Phil combo, but I think if you are going to save weight, you should go all the way and try to save on every component (within budget of course).