The Seifert is shown as out of stock, so that might make your decision easier.
I think everyone will have a price point below which buying a bow sight unseen is OK. I just bought a $400 bow - I bought it because I trusted the person selling it. Whether or not $1000 is above or below that price point for the OP isn't for me to say, but I agree with Jeff - for $1000, I'd want to play it first.
A thousand here, a thousand there, and first thing you know, it adds up to real money.
Just my opinion, your mileage may vary.