Flowers - I need serious help

I am a Westchester bride and went to three floral design places:

(1) Diana Gould
(2) Daniel (he is a DG spinoff)
(3) House of Flowers

Diana Gould was the most professional person ever. She really is an acute business woman and makes no mistakes. For bouquets for 9 BMaids, my bouquet, 10 high centerpieces, 10 low centerpieces, 2 altar pieces, 10 buttonholes for the men, 2 Mother corsages, 1 Junior Bmaid Bouquet, beautiful embroidered golden table overlays, gold ballroom chairs and rose petals for the cocktail tables I was quoted $10,000.

Daniel had the most unique designs. He was around the same price as DG (in fact he quoted me way more but I wouldn't use all the things he quoted me for).

House-of-Flowers was also $10,000 but it's for everything including many more church flowers and cocktail table arrangements etc. I could definitely get it down to $8900 pretty easily I think. What I didn't like about him was I felt rushed and honestly I still have no idea of his style or anything else.

All have sent a quote with a request for a deposit.

Questions: How much are you all paying for similar flowers? Are you getting spot lighting? Do you think I am being ripped off. I really don't know what to do next. I want samples but do I need to give a deposit to get a second appointment?

Here attached are pictures of the type of centerpieces I am going for (these were done by Daniel) to give you an idea of scale and style. And you can also see the gold overlays and ballroom chairs I am paying for (this is actually a photo of the room I will be married in so is fairly representative of what I want).

The reason I am worried I am being taken for a ride is I made a fatal mistake in my negotiations. THey asked memy budget and I told them $5,000-10,000. Well all quoted me $10,000.

HELP!!!!!!!

(hold on trying to attach pics)