bulk florist vases

Florists please help! What kind of central flowers should I get?
My colors are red and white with touches of black. The theme is Romantic and elegant. (If you can call it a theme!). I definitely want roses, but because of my small budget, its all for yourself and I'll try to find a way to bulk up floral center without using all roses. The vases are 20 "& 24" Eiffel Tower vases. I black tablecloths and lots of candles and rose petals on tables. I'm afraid that the flowers will look tacky if I have enough in the mud. Another question I had the idea of using 1 or 2 black ostrich feathers and some hanging by the glass crystals, not your socks? My vases http://www.save-on-crafts.com/tallglassvases. HTML I forgot to add, I bought a bunch of right holders who are recommended for these ships, so it was not technically visible. I use floralytes Fill vase and red gems.
http://www.samsclub.com/shopping/navigate.do?catg=1539 since he said you're on a budget at a glance Sams Club have many flowers for a very cheap, D, but I'd put flowers in the vase can be as roses and a feather ostrich, which seems pretty