I'll post a pic of my set,I did't want to detract from my e-ring so I went plain,but I have seen some beautiful sets that work so well together,and as a few have said before,you're going to be the one wearing,so go for what really makes your heart purr!!!!
Incidentally,I never went for an eternity in the end,I had my diamond studs upgraded instead,I did'nt want to 'interupt' my wedding set,as I liked them a bit plain,and I have had a big platinum band,the one with the wave and lil diamond in it that I always wore on my other hand,so I never really wanted to get an eternity for my right hand.
If I did'nt have the big band already,I'd have gone for an eternity for that hand.Its all personal preference really,go for what you love!!