My Sample Low Centerpiece, what do you girls think?

We wanted to have a mixture of high and low centerpieces. I already posted my highs, which I love, but here are my lows.

OK so here is my sample low centerpiece the way it looked when we went in. Its missing the lilys. (By the way thats the green sea glass.)



I didn't love it, my mom hated it. One thing she hated about it was it didn't look full. The other was that the stems showed.




To solve the fullness problem we tried round, but we have oval tables.




To hide the stems we talked about...
- putting a ribbon around it also to bring in my color, since the beach glass is the wrong color and will be white.
- setting it on the bowl with the white beach glass below it, the way the high centerpieces are placed, but this will cost a littlle more $ and you won't be able to see over them
- putting greens inside the bowl around the stems
- or leaving it as it is, but the beach glass will be white, since the green glass doesn't go with my colors (my mom hates this idea.)

Here it is with the ribbon.



So three questions....

1) Which do you like round or square?
2) How should we fix the stem problem? (I made a poll for this part).
3) Should we forget the low ones and do all high if my dad will spring for them? It was less of a decision about money and more about aesthetics. But since the decision was made money has become more of an issue.