Best gift to give at wedding?

The couple (my bro-in-law & his fiance) have a gift registry (had no shower) , What is more approprite to bu off the regitry or money? My husband wants to buy them the dysun (?) vacuum they want, I think we will look silly walking into the reception with that big gift. What do you think.
money
money--and make sure you give more money than it cost for them to have you and your guest at the reception.

But if you decide to give the dyson, just drop it off at their house before the wedding (not the same day of course!) A couple of days or weeks prior is fine.

You don't have to literally TAKE the wedding gift to the wedding.
Money is good.
Hey frodo what kind of dumba** answer is that? give them food coupons? that's an insult.
a coupon for a photo shoot
Hey gifts are nice, I am getting married in two weeks and anything I get off my registry would mean a lot. That vacuum has got to be expensive, it isn't tacky or silly to give something like that.

This is a nice gift, but a cheap way to make this gift even better is to show them you love them and support them by being there.
maybe, kitchen appliances...
Money!
Money every time.....who wants to walk in with a vacuum cleaner under their arm, I quite agree.
champagne 'crystal'
we got an awesome gift voucher for our local Bunnings hardware store. - everyone needs hardware!


Answers:
I think its best to give them something off the registry. I mean they have the registry for a reason, right?

I think money is tacky to give as a gift - its like you didn't feel like taking time to pick something out - even if its just off their registry.

Go for the vaccum - thats a generous gift and you know for sure it will be used! Have the store either drop it off at their house or have them ship it. If its from a dept store and thats where their entire registry is at they generally have a way that they can notify the couple whats been given as gifts and they can pick the items up at their leasure. You just send a card. Or drop it off at their house before the wedding - (not the day of).

Its considered tacky to show up at the wedding with a gift. The bride and groom have enought to keep track of that day and they don't need to keep track of who brought what for gifts!

Have fun at the wedding!
Maybe,6 Heart Photo frames,4 big picture shots,3 big box of chocolates,YUM!!
Buy the vacuum cleaner that they want. He can bring in to the reception.
money they can get what they want.
Money is a tacky, thoughtless gift. Buy them something off their registry. That's what they want and/or need. The purpose of wedding gifts is to help the couple set up their household.
Wedding cake
mostly people give silvir were plates non used new and stuff like wine you know home aplyinces
A BRAND NEW HOUSE AND DON'T FORGET THE CAR
honeymoon ticket
I'm getting married next month, and am also 'registered'. I did this because a lot of our family and friends live out of town and will not be able to travel and don't want to send $ via mail. MOST couples prefer money, because it helps out on the honeymoon. Having just invested a lot of money in the wedding and reception.
Trojans
Either money or the vacuum would be great gifts. If you do get the vacuum, do not bring it to the reception! Either have it shipped to their home or deliver it personally to their home anytime prior to the wedding. Wedding gifts other than envelopes are difficult to deal with at the reception.
money
A gift card to a local supermarket placed discreetly in an envelope.
of course money